Drive SAE/Metric Ratchet and Socket Mechanics Tool Set (50-Piece). 90-tooth design with 4-degree arc swing for tight work spaces. Parallel flats on sockets prevent rolling. Removable inner tray specifically designed for steel storage case. The Milwaukee SAE and metric 50 piece 1/4 in. Drive ratchet and socket set was designed from the ground up to offer better access in tight spaces and maximum tool strength. The 90-tooth ratchet tool offers 4° of arc swing and a slim profile design, allowing work in tighter spaces. Innovative socket design has 4 parallel flats, which deter rolling and are wrench compatible. Optimized socket geometry helps reduce bolt rounding and stripping. Socket sizes are stamped into the flats for improved easy-to-read visibility. The ratchet and socket kit comes with a removable inner tray, designed to be stored long-term in a steel storage chest. It also comes with a durable carrying case for ultimate portability. The set comes with accessories included so that our users 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. Features: Adapter(s) included, Extension(s) included, Low Profile. Hand Tool Type: Ratchet & Socket Set. Measurement Standard: Metric, SAE. Number of Pieces: 50. Tools Product Type: Hand Tool. Drive Size: 1/4 in.