The Sealey 74 Piece Security Torx, Hex, Ribe and Spline Socket Bit Set is a comprehensive professional socket bit collection designed for working with specialist fasteners across automotive, mechanical and assembly applications. This extensive set provides tradespeople with the essential profiles needed for security fasteners commonly found in modern vehicles, machinery and equipment. Manufactured from high quality S2 steel with a zinc phosphate finish, each bit is hardened to 58-62 HRC and tempered for enhanced strength and durability. The set includes both 30mm and 75mm length bits across all profiles, offering versatility for accessing recessed or hard-to-reach fasteners. Two Chrome Vanadium steel drive adaptors (3/8" and 1/2" square drive to 10mm hex) are included, allowing the bits to be used with standard ratchets and breaker bars. The comprehensive selection covers standard and security TRX-Star bits from T20 to T60, metric hex bits from 4mm to 12mm, Ribe bits from M5 to M14, an