424001 is part of the CK Tools Master Hand Tool Set, which consists of 486 pieces comprised of metric and imperial sockets, spanners, pliers, screwdrivers, and other various hand tools. The set also includes a compact, three-drawer tool chest. The pieces are made of chrome vanadium steel, making them strong and durable enough to last many years. This set also comes with its own cleaning cloth, keeping the tools rust-free and in good condition.