Item Type: Drill Bit Sharpener Material: ABS Colour: Navy Blue Hex Shank Diameter: 1/4in Applicable Grinding Drill Bit Diameter: Approx. 2 ~ 12.5mm / 0.1 ~ 0.5in Function: For grinding passivated drill bits (not suitable for drill bits with high hardness). 1Drill Bit Sharpener: This drill bit sharpener works perfectly in sharpening various iron drill bits, making it incisive again. 2Use in Conjunction: With 1/4in diameter hex shank, ideal for use on tools such as electric screwdriver, manual screwdriver, etc. 3Practical Grinding: Suitable for grinding drill bit from 2.0mm to 12.5mm, and also ensures efficient sharpening with great ease. 4Simple for Carrying: Designed to have a small size and a light weight, the easy storage and carrying largely simplify daily work. 5Extra Durability: Made of premium ABS material, which is not easy to deform, the drill bit grinder is very durable for long use.For grinding iron drills bits, not suitable for drill bits with high hardness. Please allow 1?3mm error in manual measurement of the size. After use, put it in a dry and clean place. Should not use with corrosive chemicals, which may shorten the life expectancy. 1 x Drill Bit Sharpener 1 x Wrench 1 x Nut 1 x Washer