CAT40 ER40 Collet Chucks 4 Pcs w Projection 3.15"-4"-6" Balanced G2.5 @20,000RPM

Package includes: 1PC CAT40 ER40 collet chucks with Projection 3.15"; 2PC CAT40 ER40 collet chucks with Projection 4", and 1 PC CAT40 ER 40 collet chuck with Projection 6". Balanced to G2.5 @20,000 RPM Tested T.I.R: 0.0001" Made of Prime Quality alloy steel and hardened to HRC 60-62.