The Proxxon 23280 Wrenches set is a 50 piece socket spanner set with metric and imperial sizes. The set includes 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 17mm, 18mm, 19mm, 21mm, 22mm, 24mm, 27mm as metric sizes and 1/4”, 7/32", 3/16", 5/32", 1/8", 7/64", 3/32", 5/64", 1/16", 0.050" as imperial sizes. It is constructed of high-quality galvanized steel for strength and durability, and is heat treated for maximum torque capability. The sockets are designed for maximum accessibility and maximum reach with a deep engagement. The set includes a plastic storage case for easy transport and storage.