Description: -Quality pink corundum mounted grinding stone wheel -Material: corundum , metal shaft -Shape: Cylindrical , Bullet , Wheel -Size: 16mm , 25mm , 30mm , 35mm -Shank diameter: 6mm - 1/4'' -With 1/4'' shank fit a most of electric drills and grinder. -The mounted grinding stone used on repair, polishing and molding of metal and non-metal materials. such as furniture, handicrafts, molds, music bodies, various model airplanes and ship models. The chrome corundum material has a high hardness. It's especially suitabe for the grinding of steel after heat treatment.