Wera 867/1 BDC TORX Bit – 30 x 25mm. Bits for recessed TORX screws with tiny diamond particles on the bit tip. This ensures a secure fit of the bit in the screw reduces the contact pressure required and lowers the risk of slipping. Come with a Torsion zone – where kinetic energy is diverted from peak loads – and softer BiTorsion zone to prevent the bit tip from twisting under peak loads. This greatly extends the product service life. 1/4″ hexagon suitable for holders as per DIN ISO 1173-D 6.3.