Specification: Color:Blue Orange Material: ABS & Corundum grinding wheel Function: Quick and easy way to sharpen the drill bit Packing quantity: 1pcs Product size: Package size: Weight: Features: 1.Use electric drill power drive, wear-resistant corundum grinding wheel to improve the bit rate. 2.Applicable drill size: 5/64″ – 13/64″ (2mm-5mm) 7/32″