Specifications:Made of wear-resistant corundum grinding wheel, it is durable and sturdy.It mainly used for grinding iron drill bits, and other high hardness drill bits cannot be used.This product can improve drill bit usage, and is easy to install.Item Name: GrinderMaterial: CorundumFeatures: Portable, Durable, Easy to UseSize: 170mm x 85mm/6.69" x 3.35" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Grinder1 x Grinding Wheel1 x Wrench