The sockets are manufactured from heat-treated chrome vanadium, these sockets deliver exceptional durability, ensuring they withstand heavy use and retain their strength even under challenging conditions. The bits are manufactured from resilient S2 steel, significantly enhancing durability and strength, making them a reliable tool set capable of withstanding tough and rigorous applications. Specially designed, moulded tray, offering convenient and organized storage, keeping the sockets secure and easily accessible, streamlining your workspace and tool management., Weight: 2.20462262 pounds, Manufacturer: Blue Spot Tools