No need to buy a whole new set of drills to keep your drills sharp and ready to go Why not give the old dull bits a new lease of life? Use this drill sharpener with your power drill to keep your bits sharp and ready to use without having to buy a whole new set of bits 100 grit gravel gives the drill a smooth, even and sharp edge. feature: Sharpen drill bits quickly and easily Powered by an electric drill Wear-resistant corundum grinding wheel Just spin the 100-grit wheel with the drill and press the drill on it to get a sharp edge in no time Designed for multiple drill sizes Small and portable Rustproof, waterproof, dustproof The perfect gift for any handyman Specification: Material: corundum, ABS Suitable for drilling size: 5/64" - 13/64"(2mm-5mm) 7/32" - 21/64"(5mm-8mm) + 11/32" -1/2"(8mm-12.5mm) Angle stop degrees: 60 degrees left Safe and easy to use with appropriate built-in guides 100 Grinding Stones Power drill that needs to run between 2000 and 3500 RPM Dimensions: 18.5cm x 4cm The package includes: 1 x Drill Sharpener 1x Drill Sharpener Grinding Ston