CAT BT CNC ER40 Chuck or Holder CNC Precision Collets 1/4 Inch Weight: 11 Ounce *Rough Estimation* Fit all R8, Morse Taper, CAT BTCNC ER32 Chuck Or Holder Running True At High Speed Turning All Collets Are Checked Its Runout Individually On 4 Contact Points By A High Tolerance Bench Marked Testing Rod Made From Alloy Spring Steel And Hardened To HRC 44-48 Size: 1/4 Inch Qty: 1 Light Item