ER40 COLLETS SET 1/8" to 1" (23 PCS). Made from alloy spring steel and hardened to HRC 44-48. Hole Size: 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", 9/16", 19/32", 5/8", 11/16", 23/32", 3/4", 13/16", 27/32", 7/8", 29/32", 1".
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