DuraTech 497-Piece Mechanics Tool Set - Constructed of chrome vanadium steel and heat-treated for strength and durability. Full polished-chrome finish for anti-corrosion protection. The socket kit comes with different types of sockets, 90-Tooth ratchet handles, extension bars, screwdriver bits, hex keys that provides more tools to choose for mechanical works. Suitable for various scenarios, cars, bicycles, appliances, lawn equipment and all kinds of mechanical maintenance. Size: SAE/ Metric.