Best Spiral Reduced Shank Drill Bits in 2026

M-35 Cobalt Alloy Steel Construction for Durability in abrasive materials

Jobber drill bits feature 135-Degree Split Point Tips for reduced bit walking

Straight shank works in both keyed and key-less drill chucks

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

Gold and black surface treated for use in stainless steel and other hard metal drilling

Round shanks allow use with a wide variety of toolholding systems

[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.

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.

【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.

【Size】Cutting Edge Diameter : 14mm / 0.55"; Shank Diameter : 10mm / 0.39"; Cutting Edge Length: 56mm / 2.2"; Total Length : 150mm / 6"

【Hard & Durable】 Made of tungsten steel material, the twist drill bits are hard enough, anti-bending and will not fracture easily. The surface coating can better protect the drill bit sets from corrosion and espand their longlife.

【Sharper & Quicker】The sharp cutting edge and spiral flutes promote faster as well as preciser drilling. Helping you work more efficiently and get rid of glitches or scrap.

M35 HSSCO High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance.

Black and gold polished treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge.

135-Degree split point for accurate centering and fast penetration and round shanks allow use with a wide variety of toolholding systems.

【The Size You Will Get】 Cutting drill bit diameter: 11/16"(18mm); Shank: 1/2"(12.7mm); Length: 6.1"(155mm), the cutting edge is finely ground and sharp, with good drilling effect, to meet your different Cutting accuracy

【High-Quality Material】 Made of high speed steel, high hardness, stable performance, sharp and durable, can drill stainless steel, iron and copper, aluminium alloy, wood and plastic, etc. Smooth and sharp grooves, oxidized surface, corrosion resistant, can be better lubricated, making drilling more efficient

【Wide Scope of Application】 Ideal for drilling in moulded steel, plain steel, channel steel, copper, aluminium, brass, oak, pine, PVC, polycarbonate, acrylic, ABS, nylon, composite materials, wood or 1-3mm stainless steel, etc. The universal round shank design adapts to different types of drill chucks, making drilling fast and accurate while saving time and effort