Multistage drills WWSKT HSS TN2 Material groups - - - - Internal cooling - - - - Quality of material HSS HSS HSS HSS Coating - - TN2 TN2 Flute type straight spiral R25 straight spiral R25 Nakrój / Chamfer Ćd LL ĆD INDEX INDEX INDEX INDEX 8 Tole7ra5ncja4/6/8/10/12/14/16/18/20 W1-641010-0420 W1-648010-0420 W1-646010-0420 W1-649010-0420 6 10 100 6/8/10/12/14/16/18/20/22/24/26/28/30 W1-641020-0630 W1-648020-0630 W1-646020-0630 W1-649020-0630 10 100 6/9/13/16/19/21/23/26/29/32/35/38 W1-641030-0638 W1-648030-0638 W1-646030-0638 W1-649030-0638 10 100 6/9/11,4/14/17,25/19/21,25/24/26,75/30/33/35,7 W1-642030-0636 W1-645030-0636 - - 10 100 6/9/12,5/15,2/18,6/20,4/22,5/26/28,3/30,5/34/37 W1-642040-0637 W1-645040-0637 - - Example of order 165 WST W1-641010-0420