Wera Series 1 867/1 TZ Sheet Metal Bit, TORX TX 8 Head x 1/4" Drive Features Wera's tough viscous and torsion form design, for TORX screws, TX 8 x 1/4" drive For hexagon bit holders and direct drives, with 25mm blade For Fein, Bosch, Holz-Her, Metabo, and Lecurex hexagon drives Wera Bits for hard materials (e.g. metal sheets or structures) prevent premature breakages of the tip, created by the large amounts of peak torque generate to the screw and bit Limited Lifetime Warranty, German Engineered