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. For recessed TORX screws BiTorsion zone to absorb peak loads Considerable reduction in the risk of breakage, significant increase in service life Diamond coating for a secure fit in the screw, literally bites into the screwhead to prevent cam-out 1/4" hexagon drive (Wera connecting series 1) Take it easy tool finder: color coding according to profile and size