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BiTorsion bits for Phillips screws with elastic 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. Tough viscous for universal use; ΒΌ" hexagon, suitable for holders as per DIN ISO 1173-F 6.3. Features and Benefits • For Phillips screws • BiTorsion zone to absorb peak loads • Considerable reduction in the risk of breakage, significant increase in service life • Ductile and tough for hard materials • 1/4" hexagon drive (Wera connecting series 4) Contents 851/4 BTZ bits, PH 1 x 50 mm