Features 1、The kit contains 10 straight shank twist drills, which are sufficient in number and can be replaced well to meet daily drilling needs. 2、The extended straight shank drill bit is suitable for installing on electric hand drills or bench drills for drilling stainless steel, aluminum alloy and other plates. 3、Made of high‑speed steel material, the surface is plated with ti, which has high hardness and wear resistance. 4、The use of a powerful grinding wheel makes the blade flute sharper and smoother, which can effectively improve work efficiency. 5、The spiral flute design is conducive to rapid chip removal, and the operation is more labor‑saving and clean. Specification Item Type: Twist Drills Material: High speed steel Application: Hand drill, bench drill processing equipment, etc. Purpose: Drilling stainless steel, copper, iron, aluminum alloy and other steel materials Drill Size Full Length Working Length 3.2mm / 0.13in 65mm / 2.6in 36mm / 1.4in 3.5mm / 0.14in 70mm / 2.8in 39mm / 1.5in Package List 10 x Twist Drills