Standard Pack = 1 piece(s). Base = 3-3/4 x 3-1/2 IN; Capacity = 1-1/8 IN; Center Height = 3-5/8 IN; Collet Style = 5C; Overall Height = 5-1/2 IN; Spindle TIR = 0.0001 IN; Type = Collet Master; Weight = 9 lbs;