Universal Use - The Extra-Hard Screwdriver Bit Set, 35-Piece is a good choice for universal use. This complete set contains accessories for important drilling and screw-driving applications. The screwdriver bits are composed of S2 Modified Steel and an optimised heat treatment process, which provides an extra-hard quality that delivers a strong performance for all tasks. They also feature a tapered torsion zone that easily handles torque peaks by absorbing force and vibrations. All bits are colour-coded for quick viewing and identification of the appropriate bit type. Furthermore, the set contains precision-ground drill bits made of HSS (high-speed steel), which enable a fast drilling rate in metal and plastics. They have a 1/4-inch external hex shank for use with screwdrivers and drill drivers. It has a 1/4-inch external hex shank and is intended for universal screw-driving with screwdrivers and drill drivers. The Extra Hard Screwdriver Bit Set, 35-Piece comes in a practical and robust storage box providing a good view of its contents as well as safe storage and transport. The set contains: PH1, PH2, PH3 PZ1, PZ2, PZ3 S 3/4/5/6 H3, H4, H5, H6 T10, T15, T20 (2x), T25, T27, T30, T40 Nutsetter 8/10/13 mm HSS-G 2.5/3.0/3.5/4.0/5.0/6.0 mm Double blade PH2/PZ2 Double blade Th20/Th25 Features and Benefits: • Universal Use for Drilling and Screwdriving Applications • The Extra Hard Screwdriver Bit is a good choice for universal use • S2 Modified Steel and an optimised heat treatment process results in extra-hard quality for adequate performance Specifications: Set contents: (#227055 - 8678; PH1, PH2, PH3)(#227054 - 8682; PZ1, PZ2, PZ3)(#227058 - 8693; S 3/4/5/6)(#8680 - InnenSechskant; H3, H4, H5, H6)(#100340 - Security_Torx; T10, T15, T20 (2x), T25, T27, T30, T40)( ; Nutsetter 8/10/13 mm)( ; HSS-G 2.5/3.0/3.5/4.0/5.0/6.0 mm)( ; Double blade PH2/PZ2)( ; Double blade Th20/Th25) Dimensions: PH1; PH2; PH3; PZ1; PZ2; PZ3; SL3; SL4; SL5; SL6; HEX3; HEX4; HEX5; HEX6; TH10; TH15; TH20; TH25; TH27; TH30; TH40 Length: 25; 25; 25; 25; 25; 50; 70; 74; 83; 88; 99; 105; 60; 60mm