Makita Premier Torsion Bits feature a unique design which focuses the forces exerted on a regular screw bit away from the tip, meaning less chance of breakage. Impact Premier Torsion bits can last up to 10x longer than a regular screw bit, whilst an Impact Premier Insert bit can last up to 15x longer than a regular bit when coupled with an Impact Premier bit holder. The New Premier Standard - Up to 10x longer life than other screwdriver bits the new Impact Premier gives great value for money. Impact Premier Torsion bits can last up to 10x longer than a regular screw bit whilst an Impact Premier Insert bit can last up to 15x longer than a regular bit when coupled with a holder. Precision Engineering - Impact Premier Torsion Bits feature a unique design which focuses the forces exerted on a regular screw bit away from the tip meaning less chance of breakage. The Makita Impact Premier range replaces the Impact Gold range of accessories Range Features Double torsion for high durability High precision Screw Fitting New steel is used. Supports high torque Contents PH2, PZ1, PZ2 x 2, PZ3, T20, T25,T30, SL4,SL6, Magnetic Bit Holder