Sockets have 3/8" drive and are 6 point. All Duo-Socket sockets are marked by both roll stamp and large laser etching on the opposite side. The ratchet included is a 72 tooth quick release. Wobble extension provide 15 degree of deflection and can also be locked straight for normal use. Packaged in blow molded case The thin wall design of chrome hand sockets are combined with the strength and durability of Grey Pneumatic impact sockets to create the Duo-Socket. This 59 piece set is built specifically to address the needs of the professional technician using hand tools, cordless impact tools and air tools. The Duo-Socket provides one socket for all applications. This set includes the following: 72 tooth quick release ratchet, 3" and 6" wobble extension and the socket sizes include: Standard and Deep Fractional: 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1"; Standard and Deep Metric: 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm.