Best Metric Countersink Drill Bits in 2026

【IDEAL COMBO SET】 7 countersink drill bits size of Ø7/64”(3mm), 5/32”(4mm), 13/64”(5mm), 1/4”(6mm), 9/32”(7mm), 5/16”(8mm) combine with Ø19/32”(15mm) countersink pedestal, 13/32”(10mm) combine with Ø45/64” countersink pedestal. 3 countersink bits with most commonly-used sizes of Ø12mm(1/2"), 16mm(5/8"), 19mm(3/4") A 1/10”(2.5mm) Free Hex Key Wrench Plus. Come with a portable plastic case for easy convenient select, storage and organization.

【PREMIUM QUALITY】Made with industrial grade high-carbon steel, great hardness provides sharp edges, high strength takes bits with superior cutting capactiy and durability. Ideal for household woodworking and DIY Projects.

【EFFICIENT DESIGN】For 7 countersink drill bits, 3-point tricuspid ensures drill process accurate and fast, no offset, slip and bias during drilling; 2-spiral flute makes chip removing easy and efficient. For 3 countersink bits, 90°on the point & 1/4" hex shank for quick change make the countersink process convenient. All drill bits get 5-edged chatter-free chamfer cutter pedestal design makes countersink precise and smooth. All cutting edge are well hardened and honed for sharpness.

【IDEAL COMBO SET】 A set of countersink drill bits with 7 drill size, Ø7/64”(3mm), 5/32”(4mm), 13/64”(5mm), 1/4”(6mm), 9/32”(7mm), 5/16”(8mm) combine with Ø19/32”(15mm) countersink pedestal, 13/32”(10mm) combine with Ø45/64"(18mm)” countersink pedestal. A 1/10”(2.5mm) Free Hex Key Wrench Plus. Come with a portable plastic case for easy convenient select, storage and organization.

【PREMIUM QUALITY】Made with industrial grade high-carbon steel, great hardness provides sharp edges, high strength takes bits with superior cutting capactiy and durability. Ideal for household woodworking and DIY Projects

【EFFICIENT DESIGN】3-point tricuspid ensures drill process accurate and fast, no offset, slip and bias during drilling; 2-spiral flute makes chip removing easy and efficient; 5-edged chatter-free chamfer cutter pedestal design makes countersink precise and smooth. All cutting edge are well hardened and honed for sharpness.

HIGH QUALITY CARBIDE MATERIAL: The center drill bit is made of HSS M2. Compared with ordinary high speed steel, M2 material can prolong the service life, enhance wear resistance and remove chippings clearly. HSS are harder and tougher than other materials.

PLAIN STYLE 60°ANGLE: Center drill bit can be used to process the centering hole and countersink of general material. Plain style 60°angle can guide twist drill bits to process holes.

SPIRAL FLUTE: Spiral groove helps clear chips and debris away from the bit, decreasing friction and heat for a faster, cooler drilling process. The precision ground surface is corrosion resistance to achieve better using effects and prolong the working life.

TOP QUALITY CARBIDE MATERIAL: The center drill bit is made of Top quality HSSCO M35. Compared with ordinary high speed steel, M35 material can prolong the service life, enhance wear resistance and remove chippings clearly .Top quality Tatinum plated .

PLAIN STYLE 60 ANGLE: Center drill bit can be used to process the centering hole and countersink of general material. Plain style 60째angle can guide twist drill bits to process holes.

SPIRAL FLUTE: Spiral groove helps clear chips and debris away from the bit, decreasing friction and heat for a faster, cooler drilling process. The precision ground surface is corrosion resistance to achieve better using effects and prolong the working life.

FTG Parabolic Flute offers wider flute space, dispersing chips away from the cutting edges more rapidly and increasing coolant flow. The parabolic spiral allows chips to flow up quickly leaving less damage to be corrected after drilling. Package contains 3 Piece Same Size 9/64" (#6 screw) Replacement Tapered Drill Bit Only Without Four-cutter Countersink, made to replace the 9/64” bit of #6 Countersink FTG 6810PRB

FTG Parabolic Flute allows chips to flow up quickly leaving less damage to be corrected after drilling. Improved chip evacuation leads to a better surface finish in the hole. The parabolic drill tip can slip-on wood surfaces; it is recommended to hold it rigidly and drill slowly until the tip grabs the material

Higher Quality cutters FTG Parabolic Flute drill bits are manufactured from premium High Speed Steel M2 Grade 6542. Parabolic flutes are constructed with a wider flute shape for increased chip flow

Update plastic box packaging Imperial units 6PCS：1/8"(3.175mm)、5/32"（3.97mm）、3/16"（4.76mm）、1/4"（6.35mm）、5/16"（7.94mm）、3/8"（9.53mm）

Suitable for Low Hardness Materials Such as Wood, Aluminium Plate, Plastic, or Sheet Iron (thickness of less than 3mm).

Back tapered beyond tap to prevent thread damage from over-drilling

✔【6Pcs Tap Drill Bit Sets】Titanium Coated HSS Drill and Tap Bits, include M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5, set of 6 Size is clearly engraved on the shank for easy identification.

✔【Composite Cone】Fast replacement composite cone, uses drill edged principle.High hardness, rustproof, solid and durable.Taps with drilling function, used to drill a hole and cut new threads at the same time, you will have a smooth tapping experience with them.

✔ 【Widely Application】Quick change 1/4” inch hex shank. Can be used with power tools, electric drill, group general tools, air and other any standard bit holders.1/4 inch hex shank fits into power tools more easily and securely.

M35 Cobalt HSS: Super tough, resistant to wear, high thermal threshold. Designed for tackling tough materials like stainless steel and other high-performance alloys. Please ensure sufficient lubrication and cooling in extensive uses.

Cobalt coating helps with wear and thermal. Please be reminded that the countersinking performance will not be impacted even if coatings are worn down. The wear and tear of coating is normal and the performance relies on hardness of the countersink bit itself.

PRO compatibility for professional machinist and DIY enthusiasts: Round shank can be fitted with hand drills and bench drills. We recommend using bench drills for optimal results when working with hard alloys.

M2 High Speed Steel (HSS) offering a combination of hardness and toughness

Drill accurate center holes in material prior to turning, or use as a starter bit for accurate holes

4 bits #3 (1/4")

Solid carbide tools offer long tool life and faster cutting speeds than other substrates, but are more brittle and must be used with rigid toolholding systems

Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications

Round shanks allow use with a wide variety of toolholding systems

(D) hex shank: 1/4

D1: 37/64

D2: 3/16

Used for workpiece circular aperture chamfering or cone hole, the edges on the surface of the chamfering processing

Suitable for using in hardness under 25 artifacts, such as aluminum, insulation board, PVC board(Not for Stainless steel)It is not suitable for materials that are too thick or too hard.

When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging.

Accurate: A 60-Degree Angle center drill is very useful in drilling accurate center holes, 60-degree countersink holes or starter holes for bigger drill bits in metal-working

Widely Applicable: work with lathe machines and most electronic drills to drill holes in Steel, Iron, Alum, Carbon Steel, Brass and other tough material ranging from 170HB up to 200HB

Multiple Sizes: 7 Pieces of Plain Center Drill Bits Set Including 1.0 1.5 2.0 2.5 3.0 4.0 5.0 to meet different needs.

★★★★★These tap drills are made of high speed steel and feature a nitriding surface finish for high hardness and rust resistance for metric thread tap drills long service life.

★★★★★Drill Bit There are a total of 6 pieces of taps in different sizes from M3 to M10 which you can use to tap various threads; Thread: M3, M4, M5, M6, M8, M10; Pitch: 0.5mm, 0.7mm, 0.8mm, 1.0mm, 1.25mm, 1.5mm.

★★★★★Taps are designed with spiral flutes and the chip clearing process would be better. These taps are used on a machine to do the tapping, generally more accurate because human error is eliminated.

Combination Drill and Tap Bit: Thread Size: M6 x 1; Hex Shank Size: 1/4". Combination drill and tap bit set can complete hole drilling, tapping, deburring and countersinking. One-step operation greatly saves processing steps and improves working efficiency.

Wide Applications: Suitable for processing blind holes. Used for tapping aluminum, die steel, stainless steel, bronze, hard plastics, etc.. Recommended feed rate: general steel: 6-15m/min; harder steel: 5-10m/min; stainless steel: 2-7m/min; cast iron: 8-10m/min.

Features: Self-centering point, do not need assistant center drilling or center punching. Quick change 1/4-inch hex shank can be used on power tools more easily and securely. A tapered end on hex shank can prevent excessive tapping.

Tap and Drill Bit: Tap thread size: M3 x 0.5, drill bit diameter: 2.5mm / 0.1".High-speed steel tool has high hardness and toughness for wear resistance. Good for general purpose applications.

Spiral Flute Tap: Spiral flute design, upward chip removal, right hand thread cutting. For processing blind holes and sticky materials, tapping aluminum, die steel, stainless steel, bronze, plastics. Titanium coating provides excellent corrosion resistance and wear resistance.

Twist Drill Bit: Spiral chip space design for fast and clean chip removal. Sharp cutting edge provides smooth cutting and no glitches. Cobalt high speed steel tool features high hardness (HRC65-66) and high red hardness, high wear resistance

【Feature】The center drill bits are made of premium high speed steel with high strength and durability. 60-Degree angle center drill is very useful in drilling accurate center holes.

【Dimension】Tip Diameter : 2mm/0.08"; Shaft Diameter : 5mm/ 0.2";Total Length : 39mm/1.53"

【Package Content】10pcs x Center Bit Drill + 1pcs x Plastic Box

PREMIUM QUALITY - The center and spotting drills are made of durable high speed steel for providing wear resistance and remove chippings clearly and long service life.

PRODUCT FEATURE - The bits with the 60°countersink angle have double ended design.Center drill bit can be used to process the centering hole and countersink of general material.

SPIRAL FLUTE - The combined center drill bits are design with spiral groove, decreasing friction and heat, which can help clear chips and debris away from the bit quickly. It is a useful tool for DIY amateur.

Fine Workmanship: Lathe mill center drills are made of quality M2 HSS, which is high temperature wear resistant, providing the maximum durability than a conventional bits.

60 Degree Blade Angle: 60 degree countersink point for easy starting and high accuracy impact driver, playing a important role of guiding and preparing for grinding.

Spiral Flute Type: The chip groove is designed with a spiral shape to accelerated chip guide.

Tap and Drill Bit: Tap thread size: M5 x 0.8, drill bit diameter: 4.2mm / 0.17". High-speed steel tool has high hardness and toughness for wear resistance. Good for general purpose applications.

Spiral Flute Tap: Spiral flute design, upward chip removal, right hand thread cutting, fast tapping with accuracy. Suitable for processing blind holes and sticky materials, tapping aluminum, die steel, stainless steel, bronze, hard plastics.

Twist Drill Bit: Spiral chip space design for fast and clean chip removal. Sharp cutting edge provides smooth cutting and no glitches. Titanium coating provides excellent corrosion resistance and wear resistance.

✅【Universal Compatibility】The T-4241 step drill bit can provide fast and smooth drilling on holes of different diameters in steel, aluminum, wood, plastic boards, etc. (NOTE: the board must be thinner than the height of the step drill).

✅【Quick Change】The 1/4 inch hex shank is compatible with impact resistant power tools and allows for quick, easy, and convenient step drill switching.

✅【Hss 30+ Sizes】Drilling Sizes Include: 13 Step Drill Bits (1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3 /8, 13/32, 7/16, 15/32, 1/2-inch) 6-step drill bits (3/16, 1/4, 5/16, 3/8, 7/16, 1/2-inch) and 12 step drills (3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7 /8") different sized holders ensure compatibility with 1/4, 3/8 and 1/2" chuck sizes to suit your normal needs.

PREMIUM QUALITY - The countersink drill bits set for wood are made of high carbon steel, which featured with high hardness, excellent cutting power and good cutting edge retention.

3 POINTED DESIGN - The countersink drill bits pointed tip that make sure drills will not produce offset.And the edged chamfer design helps to remove chips from the holes on both sides accurately and quickly.

EASY OPERATION - The hex shank fit quick-change and lock firmly, which can prevent bits from slipping and improve your working efficiency.

High Quality: Our center drill bits made of HSS High speed steel extremely sharp blade,high temperature wear resistant.

Multiple sizes: Including 7pcs ordinary center drill bits, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0 to meet different needs.

Spiral Flute: Adopted spiral groove design, clear chips and debris away from the bit to avoid wear decrease friction and heat for a faster,cooler drilling process.

Tap and Drill Bit: Tap thread size: M2 x 0.4, drill bit diameter: 1.6mm / 0.06". High-speed steel tool has high hardness and toughness for wear resistance. Good for general purpose applications.

Spiral Flute Tap: Spiral flute design, upward chip removal, right hand thread cutting, fast tapping with accuracy. Suitable for processing blind holes and sticky materials, tapping aluminum, die steel, stainless steel, bronze, hard plastics.

Twist Drill Bit: Spiral chip space design for fast and clean chip removal. Sharp cutting edge provides smooth cutting and no glitches. Titanium coating provides excellent corrosion resistance and wear resistance.

Tap and Drill Bit: Tap thread size: 5/16-24 UNF, drill bit diameter: 6.9mm / 0.27". High-speed steel tool has high hardness and toughness for wear resistance.

Straight Flute Tap: Straight flute design, downward chip removal. Left hand thread cutting, fast tapping with accuracy. Suitable for processing through holes. For drilling and tapping aluminum, die steel, stainless steel, bronze, hard plastics

Twist Drill Bit: Spiral chip space design for fast and clean chip removal. Sharp cutting edge provides smooth cutting and no glitches. Titanium coating provides excellent corrosion resistance and improves wear resistance.

High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance

Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications

Round shanks allow use with a wide variety of toolholding systems