The Sealey 8 Piece Combination Drive Spline Socket Bit Set is a professional socket set designed for working with spline fasteners across multiple applications. This comprehensive set provides coverage across three common drive sizes, making it suitable for automotive maintenance, machinery repairs and general mechanical work where spline fixings are encountered. Manufactured from heat treated Chrome Vanadium steel, these sockets deliver durability and strength for demanding workshop environments. The fully polished black chrome finish with machined and lacquered surfaces provides corrosion resistance whilst maintaining a professional appearance. Each socket features S2 steel spline bits with a phosphate finish for enhanced wear resistance. Practical design features include a knurled ring on each socket to assist gripping with oily fingers, a common requirement in automotive and mechanical repair work. The set spans 1/4" square drive sizes (M4, M5, M6), 3/8" square drive sizes (M8, M10, M12), and 1/2" square drive sizes (M14, M16), providing versatility for different fastener sizes. Supplied on a convenient socket rail for organised storage and easy socket selection. Features and Benefits: • Heat treated Chrome Vanadium steel construction for professional durability • Black chrome finish resists corrosion and maintains appearance • Knurled grip ring allows handling with oily fingers • Three drive sizes cover common spline fastener applications • Supplied on socket rail for organised storage • Lifetime guarantee for long-term reliability Specifications: Brand: Premier Black Contents: 1/4"Sq Drive (36mm); M4, M5, M6, 3/8"Sq Drive (50mm); M8, M10, M12, 1/2"Sq Drive (57mm); M14, M16 Drive: 1/4", 3/8" & 1/2"Sq Nett Weight: 0.00kg