ER-40 5/16″ Spring Collet ~ Range of collet is .275-.316. ~ Made of high grade tool steel. ~ Hardened and precision ground. ~ Meets or exceeds Federal specifications. ~ Major diameter is 1.620″. ~ Overall length is 1.810″. ~ Collet must be placed into collet chuck nut before inserting into collet chuck. Made of high grade tool steel. ~ Range of collet is .275-.316. Hardened and precision ground. Meets or exceeds Federal specifications. Major diameter is 1.620″. Overall length is 1.810″.
