Durable Tools The Wera Z Torx Plus bits have been specifically designed for recessed Torx Plus screw applications, and are engineered for use with sockets and drivers with a 1/4” drive. The Wera Z Tough-absorbing technology prevents any premature breakage of the drive tip, and makes these bits suitable for use with hard materials. Wera Torx Plus Torx Plus screws utilise enlarge torque-transferring flanks with an ellipse-shaped profile instead of the traditional circular shape. This spreads the applied torque over a large contact area, meaning higher torque can be transferred and the life of both the screw head and the bit is extended.