tHigh torque and high impact are key with Bosch’s line of Impact Tough screw driving bits, sockets and hole saws. Bits match Phillips, Torx, and square head fasteners; a specially designed torsion zone improves durability. Sockets are available in eight- or nine-piece sets in bulk sizes from 5/16 in. to 15/16 in. Impact Tough hole saws are sized from 3/4 in. to 1 1/2 in., sporting automatic disk ejection. 7/16 in. and 3/8 in. SDS-plus shanks are available.