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High quality bits with Torsion zone - where kinetic energy is diverted from 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 • Torsion zone for absorption of peak loads • Enhanced service life of the bits • Ductile and tough for hard materials • 1/4" hexagon drive (Wera connecting series 4) Contents 1x 851/4 TZ SB bits, PH 1 x 50 mm, 2 pieces; 2x 851/4 TZ bits: PH 1x50