ER32 Collet Set By 16th or 32nds 12PC Size: 1/8"; 3/16"; 7/32", 1/4"; 5/16"; 3/8"; 7/16"; 1/2"; 9/16"; 5/8"; 11/16"; 3/4". 8PC Size: 1/8"; 1/4"; 3/16; 5/16"; 3/8"; 1/2"; 5/8"; 3/4". 25PC Set, 1/8"; 3/16"; 7/32", 1/4"; 5/16"; 3/8"; 7/16"; 1/2"; 9/16"; 5/8"; 11/16"; 3/4"; 1/16, 3/32, 5/32, 9/32, 11/32, 13/32, 15/32, 17/32, 19/32, 21/32, 23/32, 25/32, 13/21 Metric 20PC Set, 2, 2.5, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20mm Choose correct option before adding to cart