Dia 7/16" - 4" (12mm-100mm) D.O.P 1",2",or 3" (30, 50, 75, or 100mm) weldon shank or one-touch shank M2 & M35 H.S.S WANSUI® annular cutterssize 12-100mmD.O.C 30,50,75,100mmweldon shank/one-touch shank 19.05mm 3/4",1 1/4" made of hardened H.S.S, cobalt steel. TiAIN coating availableideal for drilling structural steel and metalspecial designed double-action tooth cuts work piece easily and make a ...