Standard Pack = 1 piece(s). Type = Quad-keyway Flap Roll ; Diameter = 4 Inch ; Width = 2 Inch ; Arbor = 3/4 Inch ; Grade = SX60 ; Abrasive Type = Coated ; Material = Ceramic ; Maximum RPM = 5,000 RPM ; Features = The Firmer Backing Allows The Operator To Maintain Greater, Pressure, Creating A Uniform Grained Finish, The Ceramic, Grain Also Allows For Faster Stock Removal On Stainless Steel ;