11 PC ER-32 Collet Set 3/16-3/4" Spring Collets R8 CAT BT CNC Runout .0003 11 PC ER 32 collet set Diameter Range: 3/16,1/4, 5/16, 3/8, 7/16, 1/2, 1/8, 9/16, 5/8, 11/16, 3/4" Runout: 0.0003" ; Made from alloy spring steel and hardened to HRC 44-48 Running True at High Speed turning ;Fit all R8, morse tapper, CAT BT CNC ER32 chuck or holder Quantity: 1 set (11 PC) ; Shipping Weight: 3.50 LBS