Article description Tough Wera bits for slotted screws, for universal use. 1/4“ hexagonal, suitable for holders as per DIN ISO 1173-F 6.3. For slotted screws Tough for hard materials 1/4” hexagone drive (Wera connecting series 4) Tough-absorbing Bits Tough-absorbing Wera Bits (Z) Prevent any premature Breakage of the drive tip. Code mm mm mm inch mm 05059305001 0.5 3.0 50 2“ 3.0 05059450001 0.6 3.5 152 6” 3.5 05059451001 0.8 4.0 152 6“ 4.0 05059452001 1.0 5.5 152 6” 5.5 05059453001 1.2 6.5 152 6“ 6.2 05059500001 1.6 8.0 89 3 1/2” 8.0