... friction resistance weldon shank/one 19.05mm 3/4 Sandvik Carbide inserts tipped for extended tool life when drilling on abrasive ... gives goodperformance in chip removal and friction resistance D.O.C 30,50,75,100mmweldon shank/one-touch shank 19.05mm ... machine, radial drilling machine, milling machine, lathe, etc. TCT Annular Cutter