The Sealey 9 Piece 3/8 Drive Hex Socket Bit Set delivers professional-grade performance for metric fastener applications across automotive, mechanical and general workshop tasks. Constructed from heat-treated Chrome Vanadium steel, these sockets combine strength with longevity for demanding trade use. The fully polished black chrome finish provides corrosion resistance whilst the machined and lacquered surfaces ensure smooth operation. Each socket features S2 steel hex bits with a phosphate finish for enhanced durability and wear resistance. Practical design features include knurled rings on each socket, providing secure grip even with oily fingers - essential for workshop environments. The complete set covers common metric sizes from 4mm through to 12mm, supplied organised on a socket rail for convenient storage and transport. Ideal for mechanics, automotive technicians and maintenance professionals working with metric hex fasteners. Features and Benefits: • Heat-treated Chrome Vanadium steel construction for professional durability • S2 steel hex bits with phosphate finish resist wear and corrosion • Knurled rings provide secure grip in oily conditions • Black chrome finish offers protection and professional appearance • Comprehensive metric size range from 4mm to 12mm • Supplied on socket rail for organised storage • Lifetime guarantee for long-term confidence Specifications: Brand: Premier Black Contents: 3/8"Sq Drive 45mm Hex Key Socket Bits; 4, 5, 6, 7, 8, 9, 10, 11, 12mm Drive: 3/8" Nett Weight: 0.415kg