The Kincrome socket sets are perfect for any professional application. Manufactured from chrome vanadium steel, these sockets have been hardened, tempered, chrome plated, and polished for corrosion protection. All are protected by a sturdy machined tin. Kincrome Sockets and Accessories are Manufactured from Chrome Vanadium Steel (Cr-V) and Chrome Plated to Prevent Corrosion Durable 72 Teeth Quick Release Ratchets - The socket is locked securely while in use but can be removed quickly and easily even with greasy or oily fingers Supplied in a tin with an insert for the storage Specifications 10 1/4 Drive Metric Sockets: 4, 5, 6, 7, 8, 9, 10, 11, 12, 13mm 8 1/4 Drive Imperial Sockets: 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8 9 3/8 Drive Metric Sockets: 10, 12, 13, 14, 15, 16, 17, 18, 19mm 6 3/8 Drive Imperial Sockets: 7/16, 1/2, 9/16, 5/8, 11/16, 3/4 13 1/2 Drive Metric Sockets: 10, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 24, 27mm 9 1/2 Drive Imperial Sockets: 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1 14 Accessories 3 x Ratchet Handles 1/4, 3/8, 1/2 Drive Flex Handle 1/2 Drive 375mm 3 x Universal Joints 1/4, 3/8, 1/2 Drive 2 x Extension Bars 1/4 Drive 50, 150mm Extension Bar 3/8 Drive 150mm 2 x Extension Bars 1/2 Drive 75, 125mm 2 x Spark Plug Sockets 1/2 Drive 16mm (5/8), 21mm (13/16)