Description:

5pcs Drill Bits Size: Hex shank size: 6.35mm / 1/4"; drill diameter: 1.5/2/2.5/3/4mm; overall length: 43+48+57+60+68+64+72+74+85+84+99+92+92mm; drill flute length: 18/23/29/37/52mm / 0.71/0.91/1.14/1.46/2.05 inch. The cutting edge allows for accurate drilling, using the correct size will ensure precise and accurate drilling results.. Titanium Coated Surface: Made of high-speed steel with titanium nitride coating which can increase the hardness of the twist drill and reduces friction between the bit and the material being drilled. Suitable for use in both handheld drills and drill presses.. High Hardness Drilling Performance: Suitable for hardened materials and hard metals, such as cast iron, malleable iron, aluminum, wood, plastic etc., and also suitable for soft materials. Great replacement for your dull drill bit to improve work efficiency.. Wide Applications: This cobalt twist drill bit is suitable for a variety of drilling applications, including metalworking, woodworking, and plastic fabrication. It is great for use with harder materials such as stainless steel, titanium, cast iron, malleable iron, and other alloys, wood, and plastic, and is well-suited for both DIY and professional use..