Drill Bit Sharpener for All Bits, Multipurpose Drill Bits Grinding Sharpener for High-Speed Steel, Masonry, Carbide, Cobalt & Tin-Coated Drill Bits Name Portable: Drill Bit Sharpener Material: Reinforced nylon + iron Color: Black, Orange Size: 9.5 x 6.5 x 6.5cm Package Includes: 1 Piece Portable Twist Drill Sharpening Drill Bit Sharpener(1 Piece Drill Sharpener + 2 Grinding Wheel Pieces 3 Modules) Steps for usage: 1. Choose the appropriate drill bit support; 2. Install the grinding head on the electric drill; 3. Put in the drill bit and start grinding; 4. Grind it smooth and sharp. Note： 1. Please allow 0~1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.