This 20 Piece 3/4" Drive 12 Point SAE Mechanics Tool Set by Armstrong comes with sockets with EYE-D™ to optimize size visibility while also providing SAE / Metric differentiation. The socket wall dimensions are optimized to provide strength while retaining access to restricted fasteners. Comes with an extra heavy duty gauge metal box with full hinge that is specifically designed for large drive size socket sets while socket sizes are also cut into the foam. The included ratchet has a compact head design, recessed reversing lever, unique "I-Beam" handle design, as well as the "Torque Wrap" design that incorporates a 15 degree ratcheting arc. All tools are manufactured from high alloy steel using the most up-to-date manufacturing process and heat treat for greater strength and durability. Meets or exceeds ASME B107.1-2002, B107.10M and US Federal GGG-W-641E specifications.