The Wera 7 Piece diamond PZ/PH/TX Set of bits with tiny diamond particles on the bit tip. This ensures a secure fit in the screw head reduces the contact pressure required and lowers the risk of slipping. BiTorsion bits with an elastic torsion zone “ where kinetic energy is diverted from peak loads “ and softer BiTorsion zone to prevent the bit tip from twisting under high strain. Comes with Rapidaptor technology which allows bits to be attached without any need to actuate the sleeve. The removal of the bit is simple just by pushing the sleeve forward for rapid bit change with just one hand. For insertion in the power screwdriver or into the chuck of the power drill.