ER-20 3/16″ Spring Collet ~ Range of collet is .16-.20. ~ Made of high grade tool steel. ~ Hardened and precision ground. ~ Meets or exceeds Federal specifications. ~ Major diameter is .830″. ~ Overall length is 1.230″. ~ Collet must be placed into collet chuck nut before inserting into collet chuck. Made of high grade tool steel. ~ Hardened and precision ground. Meets or exceeds Federal specifications. ~ Range of collet is .16-.20. Major diameter is .830″. Overall length is 1.230″. Collet must be placed into collet chuck nut before inserting into collet chuck.
