The 16-piece Insulated Hex Bit Socket Set includes seven SAE hex head sockets, ranging from 1/8-inch to 3/8-inch, as well as seven metric hex head sockets from four to 10 millimeters. Also included in the set is an insulated 42-tooth round head ratchet and a three-inch extension attachment. The sockets and accessories are neatly stored in a 5S dual-color foam organizer with sizes imprinted on the top layer.