We are offering tct core drills annular cutters. many different versions, made in germany standard hss drills, hss drills with extra cobalt, hss drill with hard coating, standard tct drills, tct drills with hard coating, etc, fully ground, high wear resistance & longer life time, ranging from 12 to 150 mm diameter, cutting depths up to 110 mm, available in weldon, quick-in and universal shanksshafts.