10 Pc ER25 Spring Collets with R8 Chuck. You are purchasing a 10 Pc ER25 Spring Collets with R8 ChuckPart Number: 230-0408. Collet and Chuck. 10 pcs spring collets. 1 pc R8 chuck. 3/32",1/8",3/16",1/4",5/16",3/8",7/16",1/2",9/16",5/8" collet size.
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