The OEMTOOLS 6-pc 3 Post Socket Tray Set, No. 22337, is designed to optimize time under the hood by eliminating time spent looking for the right tool. The tray sets each feature an extended base to keep sockets in place and to store deep, semi-deep, and shallow sockets for both metric and SAE sizes for 1/4", 3/8”, and 1/2" drive sockets. Socket ranges include metric: 4mm to 15mm (1/4” Drive); 6mm to 20mm (3/8” Drive); 10mm to 27mm (1/2” Drive), and SAE: 1/8” to 5/8” (1/4” Drive); 1/4” to 1” (3/8” Drive); 3/8” to 1-1/4” (1/2” Drive).