Designed from the ground up, this 103-piece 3/8 in. and 1/2 in. Drive SAE/Metric Ratchet and Socket Mechanics Tool 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 four 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. The ratchet and socket set is backed by a Mechanics Hand Tools Lifetime Guarantee.