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 Straight extension and the socket sizes include standard and deep fractional sizes of 5/16 inch, 3/8 inch, 7/16 inch, 1/2 inch, 9/16 inch, 5/8 inch, 11/16 inch, 3/4 inch, 13/16 inch, 7/8 inch, 15/16 inch, 1 inch and standard and deep metric sizes of 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm.