DURABLE: This 4 piece converter set is made from chrome plated, hardened carbon steel for durability SIZES: The set includes sizes 1/2″ (F) x 3/8″(M), 3/8″(F) x 1/4″(M), 3/8″(F) x 1/2″(M), 1/4″(F) x 3/8″(M) VERSATILE: : It is ideal for use as a converter for ¼”, 3/8” & ½” ratchets and flexi bars Contents: 1/2″(F) x 3/8″(M), 3/8″(F) x 1/4″(M), 3/8″(F) x 1/2″(M), 1/4″(F) x 3/8″(M) COMPACT FORMAT: Conveniently sized for storage in toolboxes and cabinets, Manufacturer: DK Tools