6 PC (R8) Round Smooth Collet Kit: Size Range, 1/8" thru 3/4" by 1/8" Increments.
11 PC (R8) Round Smooth Collet Kit: Size Range, 1/8" thru 3/4" by 1/16" Increments.
23 PC (R8) Round Smooth Collet Kit: Size Range, 1/16" thru 3/4" by 1/32" Increments.