Product Description: Suitable for ER20 collets. Made of alloy steel and hardened to HRC 60-62. Balanced to 25,000 RPM Tested T.I.R: 0.0001" Product Features: Taper: BT30.
Product Description: One BT40 chuck holder, 11 pieces prime quality ER 20 collets, and one wrench are included in the package. Collets are made in inch not from metric conversion with the size listed below: 1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16, 1/2". Made of alloy steel
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