4" x 3/4" x 3/8" x 1/8" Flaring Cup Diamond Grinding Wheel 75 Grit 75% Product Name : Diamond Grinding Wheel;Shape : Flaring Cup;Main Material : Diamond , Aluminum , Resin Abrasive Grain : JR;Bonding Agent : S2;Concentration : 75% Grit : 75;Outside Diameter : 100mm / 4";Hole Dia. : 20mm / 3/4" Rim Dimension : 10 x 3mm / 3/8" x 1/8" (W*T);Overall Depth : 32mm / 1 1/4";Color : Silver Tone , Brown Net Weight : 242g;Package Content : 1 x Diamond Grinding Wheel