The Makita Impact GOLD 9-pc 3/8" Drive Socket Set comes in Metric (No. B-49862) and Standard (No.B-34833) sizes. The set offers a 1/4" hex to 3/8" square drive socket adapter which tilts up to 15-degrees for use in tight spaces. The sockets are made from heat-treated alloy steel for high-torque applications, and are ideal for use with impact drivers, impact wrench and ratchets. The black oxide coat on the sockets is designed to resist corrosion. The socket set comes in a flexible boot for storage. The metric set comes with the following 3/8” drive impact sockets: 8, 10, 12, 13, 14, 15, 17 and 18mm. The standard set comes with the following 3/8" drive impact sockets: 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16" and 3/4".