Wera 8767 B HF TORX® Zyklop 3/8in. Drive Bit-Sockets - Torx - Wera 05003061001, This Wera 8767 B HF Zyklop bit-socket has a 3/8in. square drive and contains a TX 20 driver bit with holding function. The holding function is extremely convenient for screwdriving, with reduced risk of dropping the screw when addressing the workpiece.Hex-plus tools have larger contact surfaces to prevent rounding-out damage to the hex screw head while remaining compatible with all hexagon socket headed screws. Wera 05003061001 8767 B HF TORX® Zyklop 3/8\" Bit-Socket TX 20 x 35mm