High Quality: The impact Hex bit socket set is constructed from S2 alloy steel bit plus CR-V steel socket, ensuring enhanced shock resistance, wear resistance, and durability. The manganese phosphate coating effectively protects against rust and corrosion, ensuring long-lasting performance. Extra Length: The extra long Allen key bit sockets measure 6 inches (150mm), providing an extra reach for fasteners that are in obstructed and narrow openings. Impact Design: The socket part is designed with an impact hole to match both impact wrenches and hand wrenches, enabling the Allen wrench socket set to endure impact forces, perfect for DIY projects, mechanical maintenance, and heavy-duty tasks. Precise & Variety: The Hex bit head is engineered for a secure grip and reduced slippage, which enhances both efficiency and safety during use. The Allen wrench socket set includes metric (3mm to 12mm) and SAE (1/8-inch to 7/16-inch) specifications to meet more work needs. High Efficiency: The 3/8" drive Allen socket set is neatly stored in a blow-molded box, keeping Allen bit sockets organized and easily accessible. Each Hex socket features clear laser-etched size marking, allowing you to quickly locate the required socket and improve work efficiency., Manufacturer: LIBRATON