Item Type: Twist Drill Bit_x000D_Material: High speed steel_x000D_Application: Hand drill, bench drill processing equipment, etc._x000D_Uses: Drilling stainless steel, copper plate, iron plate, aluminum alloy and other steel materials_x000D_Drill bit sizeapprox.Total lengthapprox.Working lengthapprox._x000D_6.0mm / 0.24in99mm / 3.9in63mm / 2.5in_x000D_6.2mm / 0.24in99mm / 3.9in63mm / 2.5in_x000D_6.5mm / 0.26in105mm / 4.1in67mm / 2.6in 1Suitable for processing equipment such as electric drills and bench drills, used for drilling stainless steel, copper plates, iron plates, aluminum alloys and other steel materials 2The drill bit is accurately made of Ti?plated high?speed steel, come with high hardness and good heat resistance 3Possess high cutting edge strength and fast gouge speed, which will effectively improving work efficiency 4The S?shaped spiral groove of the drill bit is beneficial to lead out the shavings and save time and effort, improving efficiency 5Adopt a powerful grinding wheel to make the blade groove sharper and smoother, making the drill more robust and durable10 xTwistDrill Bit