uxcell 4" OD 20mm Bore Hole Diamond Grinding Cutting Wheel Grinder Disc Product Name : Diamond Grinding Wheel;Type : Flaring Cup Main Material : Alloy;Outside Diameter : 10cm / 4" Mounting Hole Dia. : 2cm / 0.8";Overall Size : 10 x 0.1cm / 4" x 0.04" (D*T) Color : Silver Tone;Net Weight : 47g Package Content : 1 x Diamond Grinding Wheel