Best Spiral Reduced Shank Drill Bits in 2026

Daisy
Last Updated: Jul 18, 2026

At a Glance: Our Top Picks for Spiral Reduced Shank Drill Bits

BOSCH BL2747 5/16 In. x 12 In. Extra Length Aircraft Black Oxide Drill Bit
#TOP1
Bosch Bl2747 5/16 In. X 12 In. Extra
9.8
PM SCORE
BOSCH BL2634 7/64 In. x 6 In. Aircraft Fractional Black Oxide Drill Bit
#TOP2
Bosch Bl2634 7/64 In. X 6 In. Aircraft
9.8
PM SCORE
BOSCH BL2164 37/64 In. x 6 In. Fractional Reduced Shank Black Oxide Drill Bit
#TOP3
Bosch Bl2164 37/64 In. X 6 In. Fractional
9.7
PM SCORE

* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.

Summary of the Best Spiral Reduced Shank Drill Bits of 2026

Bosch Bl2747 5/16 In. X 12 In. Extra Length Aircraft Black Oxide Drill Bit

BOSCH
BL2747
0.00 X 0.00 X 0.00 inches
0.25 pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

Available in jobber length, stubby length, extended length (aircraft), 1/2 In. reduced shank (Silver and Deming)

For use in steel, copper, aluminum, brass, oak, maple, MDF, pine, PVC, polycarbonate, acrylic, ABS, nylon and composite materials

Bosch Bl2634 7/64 In. X 6 In. Aircraft Fractional Black Oxide Drill Bit

BOSCH
BL2634
3.50 X 0.71 X 0.06 Inches
0.07 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

Available in jobber length, stubby length, extended length (aircraft), 1/2 In. reduced shank (Silver Deming)

For use in steel, copper, aluminum, brass, oak, maple, MDF, pine, PVC, polycarbonate, acrylic, ABS, nylon and composite materials

Bosch Bl2164 37/64 In. X 6 In. Fractional Reduced Shank Black Oxide Drill Bit

BOSCH
BL2164
0.00 X 0.00 X 0.00 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

Available in jobber length, stubby length, extended length (aircraft), 1/2 In. reduced shank (Silver and Deming)

For use in steel, copper, aluminum, brass, oak, maple, MDF, pine, PVC, polycarbonate, acrylic, ABS, nylon and composite materials

Uxcell Reduced Shank Twist Drill Bits 12.5Mm High Speed Steel 4341 With 12.5Mm Shank 2 Pcs For Stainless Steel Alloy Metal Plastic Wood

UXCELL
A19102500UX0147
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
uxcell 9.95

Features

Features: Cutting Edge Diameter : 12.5mm / 0.49"; Shank Diameter : 12.5mm / 0.49"; Cutting Edge Length: 102mm / 4.02"; Total Length : 150mm / 5.91"; Cutting Direction: Right Hand

High Speed Steel Tool: High-speed steel straight shank tool is good for most general purpose applications, offering a combination of hardness and toughness for wear resistance

Sharp Spiral Flutes: Provide neat and smooth cuts. High cutting edge strength, fast cutting speed. Spiral groove facilitates the export of metal chip, saving time and effort in operation.

Black & Gold Oxide Finish: Premium gold titanium and black nitride dual coating can apply lubricant better for smoother drilling and is more durable and corrosion resistant

Versatile Uses: For use in a wide range of stainless steel, aluminum alloy, iron, copper, brass, wood, plastic, and other metal materials. Suitable for hand drills, bench drills, etc. Clamping stable round shank design, not easy to shake, tight clamping without slipping

Uxcell 26Mm Reduced Shank Drill Bit Hss 6542 Black Oxide With 1/2 Inch Straight Shank

UXCELL
A18103100UX0199
7.48 X 1.97 X 1.97 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
uxcell 9.95

Features

High Speed Steel tool - 26mm cutting diameter. Good for most general purpose applications, featuring a combination of hardness and toughness for wear resistance

Reduced Shank - Expanding the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes

Black Oxide Finish - Black oxide treatment adds lubricity. Small pockets on the surface of the tool that act to hold coolant near the cutting edge

Wide Application - Design for drilling in low and medium tensile strength materials, such aluminum, iron, copper, brass and metal

Please Note: To make clean and precise holes, water is required for lubrication and cooling when drilling metals. Increased use of water lubrication will extend drill bit life

Uxcell 32Mm Reduced Shank Drill Bit Hss 6542 Black Oxide With 1/2 Inch Straight Shank

UXCELL
A18103100UX0207
7.48 X 1.97 X 1.97 inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
uxcell 9.95

Features

High Speed Steel tool - 32mm cutting diameter. Good for most general purpose applications, featuring a combination of hardness and toughness for wear resistance

Reduced Shank - Expanding the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes

Black Oxide Finish - Black oxide treatment adds lubricity. Small pockets on the surface of the tool that act to hold coolant near the cutting edge

Wide Application - Design for drilling in low and medium tensile strength materials, such aluminum, iron, copper, brass and metal

Please Note: To make clean and precise holes, water is required for lubrication and cooling when drilling metals. Increased use of water lubrication will extend drill bit life

Jefe Hex Reduced Shank Industrial Drill Bit, 5/8 Inch Silver And Deming Drill Bits, Hss Black Oxide Finish Drill Bits, 135-Degree Split Point, 1/2" Shank For Most Handle, Ideal For Steel, Copper, Aluminum, Zinc Alloy, Wood And Plastic

JEFE HEX
JH706040
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Jefe Hex 9.91

Features

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.

GENERAL PURPOSE: It is ideal for drilling steel, copper, aluminum, brass, oak, maple, pines, PVC, ABS, polycarbonate, acrylic, nylon and composite materials.

PACKAGING: 3 pcs in one package. Each drill bit is in one plastic tube, and three tubes are in one paper carton. This packaging protects drill bit well from bomping against each other and also is convienent for storage.

Reduced Shank Twist Drill Bits, 12 Mm Cutting Diameter High Speed Steel Drilling Bits, 10Mm Dia. 3-Flats Reduced Shank Twist Drill

FOCMKEAS
REDUCED SHANK TWIST DRILL 12 MM
5.91 X 0.47 X 0.47 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Dimove 8.51

Features

【Size 】Cutting Edge Diameter : 12mm; Shank Diameter : 10mm; Cutting Edge Length: 75mm/2.95"; Total Length : 150mm/5.9". Package:1 piece.

【HSS Material】Made of high speed steel 4341 offer the reduced shank tool hard and tough, cutting effectively with impressive cutting performance.

【Gold and Black Oxide Finish】Gold titanium and black nitride dual coatings can apply lubricant better for smoother drilling and is more durable and corrosion resistant than the regular surface.

【Reduced Shank】 Reduced shank drill expands the size range capacity of a portable drill chuck. Design of triangular shank to increase cutting force and prevent slippage of shank during working.

【Widely Application】The reduced shank bits can be used in general applications including drilling in hard metals such as stainless steel, copper, iron,brass, aluminum alloy, and can be used for softer materials like wood, and plastic as well.

Neiko 10235B 13/16” Drill Bit For Metal, 1/2” Shank, Silver And Deming, 135° Split Point, High Speed Steel Drilling Bit For Metals, Wood, Plastics, Composite Materials

NEIKO
10235B
6.20 X 0.85 X 0.85 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

HSS HIGH SPEED STEEL: The high-speed steel material these bits are made of are designed to ensure sharp and fast execution in any material for clean results while making the bit long-lasting, durable, and wear resistant.

135° SPLIT POINT DRILL TIP: The 135-degree split point increases cutting speed with self-centering with no pilot hole and prevents walking while clearing chips and particles faster.

1/2” TRI-FLAT SHANKS: The tri-flat on the shanks of these drills are constructed for tighter chucking to maximize the hold to create precision holes.

CHISELED PRECISION CUT: Each of the 13/16 inch drill bits have a precision manufactured cut for accurate drilling and the all-purpose reduced shank has a 1/2-inch chiseled diameter to fit any type of drill chuck with a precise and snug fit.

DRILLING TYPES: This 13/16-inch silver and deming drill bit is ideal for drilling into steel, copper, aluminum, brass, wood, oak, maple, MDF, pine, PVC, polycarbonate, acrylic, ABS, nylon, and composite materials.

#TOP10

Auniwaig Reduced Shank Drill Bit, Hss Drill Bit 1.26", High Speed Steel With Straight Shank For Iron, Cooper, Aluminum Plate, Metal

AUNIWAIG
CU7700Z2102HF-FBA
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Auniwaig® 9.89

Features

【Parameter】- Material:HSS-6542;Hardened to:65-66Hrc;Cutting Diameter:32mm/1.26inch;Total Length:150mm/5.91inch

【Material】- High speed steel 6542 is designed to ensure sharp and fast execution in metal surface for clean results;32mm cutting diameter. Good for most general purpose applications, featuring a combination of hardness and toughness for wear resistance

【Advantage】-Expanding the size range capacity of a portable drill chuck; Common flute and overall length for minimal adjustment during tool changes

【Special Design】-Black oxide treatment adds lubricity; Small pockets on the surface of the tool that act to hold coolant near the cutting edge

【Wide Applications】- Design for drilling in low and medium tensile strength materials; such aluminum; iron; copper; brass and metal

Top 10 reduced shank drill bits Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Bosch 20
Uxcell 11
Auniwaig 1
Dremel 1
Focmkeas 1
Jefe Hex 1
Neiko 1

Top 10 reduced shank drill bits Brands Pie Chart


We've carried out a comprehensive analysis of 6,083 reviews on reduced shank drill bits, using our selection criteria to identify the best options in the home improvement. Our findings reveal that most customers typically select reduced shank drill bits priced around $10.97, with top brands including highdril, efficere, hiltex, 1wanyue, accusize industrial tools, valyriantool, neiko, ta-vigor and newshark and bosch

Our team of expert editors reviewed these high-quality items and handpicked the top 10 reduced shank drill bits for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the home improvement category. These include ningbo diatool diy tools, efficere tools, amazon.com, 1wanyue, accusize tools, valyrian tools, funitricuuu, newshark and gyros tools and jefe hex .

We are dedicated to assisting our users in finding the right bits Products based on their needs, saving them considerable time when choosing which reduced shank drill bits to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.