This 56-piece 3/8 in. Drive ratchet and socket set offers better access in tight spaces and maximum tool strength. The 90-tooth ratchet tool offers 4° of arc swing and a slim profile design, so you can work in tighter spaces. The innovative, wrench-compatible socket design has 4 parallel flats to help prevent rolling. Optimized socket geometry additionally helps reduce bolt rounding and stripping. Find each socket size stamped into the flats for easy-to-read visibility. This kit includes a removable inner tray and is designed to be stored long-term in a steel storage chest. It also comes with a durable carrying case for ultimate portability. The set’s accessories make sure the user can get every job done, both in the garage and on the jobsite. 4° of arc swing. Socket flats deter rolling. Removable inner storage tray. Includes: standard sockets: 1/4 in. 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm deep well sockets: 1/4 in. 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm accessories: 3 in. Extension, universal swivel 90-tooth ratchet.