The socket spanner socket set from BGS is a versatile tool set that has been specially designed for applications with hexagon drives. With an internal square drive of 6.3 mm (1/4 inch), this set offers a wide selection of sockets that are available in various inch sizes. The sockets are made from high quality chrome vanadium steel and have a chrome plated finish for durability and corrosion resistance. The knurling on the inserts enables improved handling and a secure grip, while the practical metal rail ensures tidy storage and easy access to the individual parts. This set is ideal for professional mechanics as well as DIY enthusiasts who value quality and functionality. Made from high quality chrome vanadium steel for increased durability. Chrome plated finish for corrosion resistance. Knurling for better grip and handling. Practical metal rail for storing and organising the sockets. Pro Torque sockets, 6.3 mm (1/4") drive: 3/16" - 7/32" - 1/4" - 9/32" - 5/16" - 11/32" - 3/8" - 13/32" - 7/16" - 15/32" - 1/2".