Best Spiral Reduced Shank Drill Bits in 2026

HSS Titanium Coating - Classic HSS construction with titanium coating for capability and durability. The cutting edge is hardened and honed for sharpness, chatter-free design with staggered cutting teeth ensure the precise countersinking and hole smooth clean.

Flutes Form - 2 flutes form helps clear chips and debris away from the bit, decreasing friction and heat for a faster, cooler drilling process.

Quick Change - 1/4 inch hex shank fits into all power tools more easily and securely, specially for locking into quick change chuck. We also offer a quick-change adapter to better quick change.

①Specifications: 16 PCS includes 1/4" (6.3mm), 3/8" (9.5mm), 1/2" (12.7mm), 5/8" (15.8mm), 3/4" (19.0mm), 7/8" (22.2mm), 1" (25.4mm), 1-1/8" (28.5mm), 1-1/4" (31.7mm), 1-3/8" (34.9mm) ，1-1/2（38.1mm), 1-5/8(41.28mm), 1-3/4(44.45mm), 1-7/8(47.63mm), 2(50.8mm) and 2-1/8(53.98mm) forstner bits

②Features: Hex Shank is easy to install and tighten ,prevent the bit from slipping. Extra sharp cutting spurs is especially designed for cutting through hard and soft wood or other materials smoothly and efficiently.

③Great Performance: Easily make flat-bottomed and pocket holes with no chipping on any wood or wood products, plastic, polywood and other materials during processing or installation.

The item is Bosch Daredevil DSBE1012 12-inch drill bit extension

Used for power tool accessories, drill bits & accessories

The product is manufactured in China

WIDE APPLICATIONS - compatible with power screwdrivers, impact drivers, and other tools that accept 1/4" hex shanks, allowing for quick changing between multiple drill bits and screwdriver bits with just one power tool. suitable for soft metal, woodworking, home improvement, DIY lovers etc;

UPGRADED STRUCTURE - press in pin connection makes the bit and hex shank an integrated structure to prevent break off during drilling, greatly reduced the risk of drill bit snapped off from the hex drive;

ELIMINATES WOBBLING & CHATTER - the final straighten process is added before shipping from the factory. which keep the bit in a straight line during rotation and reduce chatter;

Patent-Pending Design - ①Optimized largest area groove for efficient and smooth chip removal, faster than standard spade bits. ②The cutting edge with unique double-side cutting spurs for grabbing wood and carving it away, creating beautiful holes with reduced breakout

High Quality - Constructed from carbon steel with fully heat-treated and black oxide coating for durability and hardness above HRC48, the head with the polished surface is made to ensure longevity and high wear resistance

Quick-Change Hex Shank - 1/4" hex shank with groove helps reduce slipping and prevent falling off as well as safety, universal for the most drill driver tool of brands in the markets

Durable Construction - HSS material with black and gold coating increases lubricity, provides corrosion protection, and increases durability. Ensures longer tool life in multiple working conditions. Tapered web provides strength, durability and reduces breakage.

No Center Punch is Needed - 135° split point design for fast penetration with less pressure. Twist drill bit kit will not "Walk" or "Wander".

Parabolic Flute - Parabolic flute for better chip removal and reduced heat build-up.

Durable Construction - HSS material with black and gold coating increases lubricity, provides corrosion protection, and increases durability. Ensures longer tool life in multiple working conditions. Tapered web provides strength, durability and reduces breakage.

No Center Punch is Needed - 135° split point design for fast penetration with less pressure. Twist drill bit kit will not "Walk" or "Wander".

Parabolic Flute - Parabolic flute for better chip removal and reduced heat build-up.

Durable Construction - HSS material with black and gold coating increases lubricity, provides corrosion protection, and increases durability. Ensures longer tool life in multiple working conditions. Tapered web provides strength, durability and reduces breakage.

No Center Punch is Needed - 135° split point design for fast penetration with less pressure. Twist drill bit kit will not "Walk" or "Wander".

Parabolic Flute - Parabolic flute for better chip removal and reduced heat build-up.

Accuracy & Longevity - 135 degree split point starts drilling immediately requires less force and eliminates “walking” across the working surface. Tapered web provides strength, durability, and reduces breakage.

Three-Flat Design - Three flats on shank eliminate bit spinning in chuck. Our proprietary parabolic flute design brings optimal chip removal which reduces heat build-up.

Wide Range of Uses - Drill bits are built for general purpose applications, such as steel/copper/aluminum/zinc alloy/wood/plastics. Also, it's ideal for DIY projects and home maintenance. Durable and reliable quality.

Durable Construction - HSS material with black and gold coating increases lubricity, provides corrosion protection, and increases durability. Ensures longer tool life in multiple working conditions. Tapered web provides strength, durability and reduces breakage.

No Center Punch is Needed - 135° split point design for fast penetration with less pressure. Twist drill bit kit will not "Walk" or "Wander".

Parabolic Flute - Parabolic flute for better chip removal and reduced heat build-up.

[Four groove step drill] - The ordinary step drill is easy to flex during the cutting process, but the four groove step drill is more stable in the cutting. The service life is twice that of ordinary ladder drills, the drilling accuracy is significantly improved, the cutting speed is faster when drilling, and it has a unique effect on stainless steel drilling.

[M35 Cobalt High Speed Steel] - M35 cobalt high speed steel can be obtained by proper heat treatment with high hardness , high red hardness and high wear resistance. Its toughness and bending strength are higher than that of ordinary high-speed steel, which is better for hard materials.

[TiAlN] -TiAlN coating is a new coating material in recent two years. It has high hardness, high oxidation temperature, good thermal hardness, strong adhesion, low friction coefficient and low thermal conductivity coefficient.

Package & Size - 6 Pieces drill bits in a double blister pack with easy opening design. Diameter 3/32 inch, total length 2-1/4 inch, working length 1-1/4 inch, 135° split point, straight shank drill bit.

No Center Punch is Needed - 135° split point design for fast penetration with less pressure. Twist drill bit kit will not "Walk" or "Wander".

Parabolic Flute - Parabolic flute for better chip removal and reduced heat build-up.

3-Flat Shank and 135° Split Point - Three flats on shank eliminate bit spinning in chuck. 135° split point designed for clean and accurate holes, requires less force and eliminates “walking” across the working surface.

HSS - Premium high speed steel for the durability of drilling in tough materials. Proprietary parabolic flute design brings optimal chip removal and reduced thermal build-up.

Black & Gold Finish - Premium gold and black nitride dual coating provides maximum corrosion resistance and durability.

COBALT GOLD OXIDE JOBBER DRILL BITS: 29 PCS high speed steel with 5% cobalt drill bit set resists high heat abrasion while drilling. Cobalt steel provides extended tool life compared to high-speed steel drill bits, and maintains the tool's toughness and hardness in high drilling temperatures. A gold oxide finish acts as a lubricant and provides wear resistance.

ROUND AND PORTABLE CASE: Say goodbye to constant losing or misplacing your drill bits! Jefe Hex cobalt drill bit set for metal comes with an ergonomic and portable round carrying case with built-in clip. The case can be easily attached to your tool belt keeping your bits within immediate reach!

135 DEGREES SPLIT POINT TWIST DRILL BITS: A self-centering 135° split point drill tip penetrates hard materials without a pilot hole and keeps sharp without walking on the surface compared to a 118-degree point. Proper twist and flute design clears chips and particles fast. Drill bits larger than 3/8" have 3/8” reduced shank for majority drills in the market. Drill bits smaller than 3/8" have three-flat shanks that reduce spinning in chuck.

Durable Construction - HSS material with black and gold coating increases lubricity, supplies corrosion protection, and increases durability. Ensures longer tool life in multiple working conditions. Tapered web provides strength, durability, and reduces breakage.

Twist Design & Performance- Parabolic flute for better chip removal and reduced heat build-up. Tapered web for greater strength and durability.

Accuracy - 135° split point tip engineered for a no-skip, clean and accurate start. For use in a variety of drilling applications including: wood, plastics and light-gauge metal.

【Specification】13 cobalt hexagonal shank bits, including 1.5, 2.0, 2.5, 3.0, 3.2, 3.5, 4.0, 4.5, 4.8, 5.0, 5.5, 6.0, 6.5 mm, with 1/4 hexagonal shank.

【Advantages】The hexagonal handle specially made for quick replacement of drill bits is an upgraded version. Compared with the ordinary hexagonal handle, it shows excellent performance, prevents the drill bit from peeling off the hexagonal handle, and effectively keeps the hexagonal handle locked during impact drilling. Cobalt drill bit is more durable than titanium drill bit.

【Complete grinding process and 135 ° points】 The fully ground spiral groove blowdown waste quickly reduces friction and heat, thus providing faster, cooler and more efficient drilling performance; 135 ° split point with straight handle can prevent slipping and make drilling stable and accurate. No center punch is required.

POINT DESIGN: 135° split point design increases cutting speed with self-centering feature and prevents drill bit walking or wobbling on working surface.

REDUCED SHANK with THREE FLATS: 1/2" reduced shank drill bit with tri-flat is designed to eliminate drill bits spinning in the chuck and ensures grip. Superior black oxide finish offers great wear resistance.

WIDE FLUTE: Parabolic flute design improves chips removal and prolongs drill bits life while drilling in metal and wood.

Designed for electricians and conduit knock out punch draw studs.

M35 Cobalt High Speed Steel for a lasting cutting edge.

Double flute design for faster cutting and reduced wear.

Diameter 6mm 1/4 Inch,diamond length 8mm,Quick-fit Hex Shank,fit a variety of quick-change chucks.

Multi-purpose for drilling of hard materials especially tiles, porcelain, granite, ceramic, glass, mirror, marble, stone, masonry, brick (not for wood)

Wax are inserted to the diamond drill bit for cooling and lubrication without adding water. Designed with hole and groove in the side of drill bit for removing stone chips.

2pcs Diameter 5/16Inch(8mm), 5/8-11 Connection, Diamond height 10mm, Total height 60MM

Vacuum Brazed Diamond Technology: More Heavy Duty and Wear Resistant than electroplated diamond bit, providing high efficiency, cuts faster, durable and sturdy.

Wax Lubricant inside: the wax cools the cutting surface during dry drilling and acts as additional cooling to extend the life of the drill.