Wera bitorsion diamond hard bits for torz screws 25mm wera 05066102001 bitorsion screwdriver bits with heat treated torsion zone for use with internal torxreg screws kinetic energy is discharged during load peaks significantly increasing the product durability diamond coating of bits provides a secure fit in the screw reducing the required pressure reduces the risk of slipping wera 05066102001 bitorsion diamond hard bit for torx screws tx15 x 25mm