Standard Pack = 1 piece(s). Type = Abrasive Flap Wheel ; Size = 2 1/2 x 1/4 Inch ; Grade = A80 ; Shank Size = 1/4 To 20 Inch ; Operating Speed = 16,000 RPM ; Maximum Speed = 23,000 RPM ; Features = 1/4 20 Inch Threaded Shaft Allows For Quicker Wheel Change ;