Feature: 1. Suitable for processing equipment such as electric drills and bench drills, drilling stainless steel, copper plates, iron plates, aluminum alloys and other steel materials 2. The drill bit is accurately made of Ti‑plated high‑speed steel, with high hardness and good heat resistance 3. Possess high cutting edge strength and fast gouge speed, effectively improving work efficiency 4. The S-shaped spiral groove of the drill bit is beneficial to lead out the shavings and save time and effort 5. Using a powerful grinding wheel to make the blade groove sharper and smoother, making the drill more robust and durable Specification: Item Type: Twist Drill Bit Material: High speed steel Application: Hand drill, bench drill processing equipment, etc. Uses: Drilling stainless steel, copper plate, iron plate, aluminum alloy and other steel materials Drill bit size（approx.） Total length（approx.） Working length（approx.） 5.0mm / 0.2in 85mm / 3.3in 52mm / 2in 5.2mm / 0.2in 85mm / 3.3in 52mm / 2in 5.5mm / 0.22in 92mm / 3.6in 57mm / 2.2in . Package List: 10 x Twist Drill Bit