... 16" - 4" (12mm-100mm) D.O.P 1",2",or 3" (30, 50, 75, or 100mm) weldon shank or one- ... 30,50,75,100mmweldon shank/one-touch shank 19.05mm 3/4",1 1/4" made of hardened H.S. ... and make a burr free holefully grounded flutes have good performance in chip removal and friction resistanceHandle for fast interface. ... lathe, etc.We also have Pilot Pin and MT Holders High Performance High-Speed Steel Annular Cutter