Description: Made of chrome corundum, with high hardness and the shape reminds well. It can be applied to grinding tools and can also be used in a variety of wear-resistant tools. Suitable for precision grinding and form grinding of tool steel, hardened steel, alloy steel cutting tools, workpiece cutting.Instructions for use Please use at the specified maximum speed. Please install the qualified protective cover before starting the machine. Please select the appropriate grinding wheel for appearance and sound inspection before installation. Newly installed or used wheels every other day should be idling for more than one minute before use. Do not stand in front of the wheel. The grinding wheel is fragile and should not be impacted or dropped; the storage should be dry and flat, and should not be stressed. Specification: Color: Pink Material: Pink Aluminum Oxide Granularity: 60 Grits Outer Diameter: 102mm / 4-inch Inner Diameter: 73mm / 2.87-inch Hole Diameter: 20mm / 0.79-inch Height: 51mm / 2-inch Package Content:1 Pcs x Grinding Wheel