... 1/4", 3/8", 1/2", 5/8", 3/4" 181-010420 2&4 Flute each of 3,4,5,6 ... ,8,10,12,14,18,20mm 181-010520 2&4 Flute each of 3,4,5,6 ... 3,4,5,6,8,10,12,14,18,20mm 181-0107104 Flute 3,4,5,6,8,10,12,14 ... ,18,20mm 181-01083 2Flute 1/8", 1/4", 3/8"181-01093 4Flute 1/8", 1/4 ... ", 3/8" 181-310120 20 2 Flute 2 each ...