Milwaukee's Ratchet and Socket Set features sockets that have FOUR FLAT? Sides that deter rolling and are wrench compatible for maximum productivity. The 90-tooth ratchet tool that provides 4? of arc swing and a slim profile for work in tighter spaces. The sizes are stamped into each socket for easy-to-read visibility. You can keep both the SAE & Metric 56-piece 3/8" and 50-piece 1/4" Drive Ratchet and Socket Sets organized in the included PACKOUT? Compact Low-Profile Organizer equipped with a clear top for easy identification of parts at a glance. This PACKOUT? Organizer is IP65 rated and built from impact-resistant materials for durability on and off the jobsite with a reinforced hinge and heavy-duty latches. The Compact Low-Profile Organizer is part of the MILWAUKEE? PACKOUT? Modular Storage System, allowing you to custom build storage systems to easily transport and organize your tools and accessories. This Combo Kit includes a total of 106 pieces: a 56 Piece 3/8 in. Drive Ratchet and Socket Set (48-22-9008), a 50 Piece 1/4 in. Drive Ratchet and Socket Set (48-22-9004), and a PACKOUT? Compact Low-Profile Organizer (48-22-8436).