LEXIVON Master HEX Bit Socket Set, Premium S2 Alloy Steel | Complete 32-Piece, SAE and Metric Set | Enhanced Storage Case (LX-144)PREMIUM 32 Piece set, Featured a wide range of SAE & Metric Bit Socket. Crafted and Designed with superior materials for increased torque and unmatched hardness. DURABLE Drop forged, Heat treated S2 alloy steel bits, Reduce wear outs. Hardened treated Chrome Vanadium steel sockets, Increase turning power. LONGEVITY Complete rust and corrosion resistance with fully polished, Chrome plated mirror finish sockets and Zinc Phosphate bits treatment.