Professional quality socket set includes 7-1/2" long, quick-release ratchet and 3" and 6" extensions. Sockets include: 6-pt. 1/4" drive standard sockets in 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16" and 1/2"; 12-pt. 3/8" drive standard sockets in 9/16", 5/8", 11/16", 3/4" 13/16" and 7/8"; 12-pt. 3/8" drive deep sockets in 7/16", 1/2" and 9/16"; 5/8" spark plug socket and 3/8" to 1/4" drive adapter. Comes in a heavy-duty steel box.