This 22 Piece 3/8" Drive 12 Point SAE Standard and Deep Mechanics Tool Set by Armstrong comes with sockets with EYE-D™ to optimize size visibility while also providing SAE / Metric differentiation. The sockets incorporate a radius corner design that engages the flats of the fastener as well as a unique retention method, cold form ball recess, which provides consistent secure retention of the socket to the drive tool. The included ratchet has a compact head design, recessed reversing lever with On/Off markings, unique "Hour Glass" handle design, as well as the "Torque Wrap" design that incorporates a 10 degree ratcheting arc. Knurling on the extension shaft provides a non-slip grip to quickly run down / remove fasteners. All tools are manufactured from high alloy steel using the most up-to-date manufacturing process and heat treat for greater strength and durability. Comes with a durable, long lasting blow molded case that will not dent or rust even under the harshest conditions while the two piece latches securely hold the box closed. Foam inserts securely hold all tools in place (black foam with blue foam underneath for easy identification of a missing tool). The bottom half of the case with the foam insert, or the foam insert itself, can be removed and placed in a tool storage drawer or organization. Meets or exceeds ASME B107.1-2002, B107.10M and US Federal GGG-W-641E specifications.