This kit from Performance Tool includes a ratchet, extension bar, 1/4-inch spinner handle, spark plug socket, adaptor, and more. With 1/4-inch and 3/8-inch drive sizes, the sockets range from 5/32-inch to 3/4-inch and 4 mm to 17 mm. The sturdy blow-molded case keeps the tool kit organized and safe. Ideal for professional and hobby workshops alike, this socket set will be in long use around any garage or vehicle maintenance bay.