[Twist Drill Bit Size]: Cutting Edge Diameter: 4.5 mm / 0.18 inch, Shank Diameter: 3.8 mm / 0.15 inch, Flute Length: 35 mm / 1.38 inch, Overall Length: 66 mm / 2.6 inch.

[Straightforward Installation]: This straight shank drill bit is widely compatible with various power drills, including bench drills, hand drills, and impact drills. Insert the straight shank into the drill chuck and tighten securely when using. Position the bit perpendicular (90°) to the workpiece; a centre punch can be used first to prevent slipping. Adjust the spindle speed and feed rate according to the hardness of the material being drilled.

[Broad Application]: The twist drill bits are suitable for rough machining of grey cast iron, ductile iron, porous iron castings, cast copper, cast aluminium, and can also drill mild steel, A3 sheet iron, brass, copper and aluminium alloy. Compatible with bench drills, vertical drills, conventional lathes and light-duty CNC drills, they are widely used for rough casting drilling, tapping pilot holes, flange through-hole processing and reaming during casting maintenance.

[Reliable and Durable]: Tungsten steel drill bits adopt brazed YG8 tungsten-cobalt carbide tips featuring outstanding heat and wear resistance as well as great bending and intermittent shock resistance to keep intact and avoid tip chipping during mass rough blank drilling; fitted with a sharp 118° standard point for low cutting resistance, easy penetration, precise centering and smooth chip removal, the optimized double clearance edge reduces friction and blade abrasion to improve hole finish, making the bits great for rough drilling on cast iron, cast copper and cast aluminum.

[Package Inclusions]: 10 Pcs x Tungsten Carbide Drill Bits