Steelex M1079 R-8 Collet Set R-8; Precision Ground 1/8, 3/16, 1/4, 5/16 and 5/16-Inch collets 3/8, 7/16, 1/2, 9/16 and 5/8-Inch collets 11/16, 3/4 and 7/8-Inch collets