(hss-e hole cutter) ,M2,M35,M42 material,TIN or TIALN coated,size from12-100mm Weldon shank & one touch shank hss annular cutter(hss hole cutter) ,M2,M35,M42 material,TIN or TIALN coated,size from12-100mmHSS-E annular cutter with thread shank HSS-E annular cutter with thread shank