The GEARWRENCH 168-piece 1/4 in., 3/8 in., and 1/2 in. Metric & SAE Mechanics Hand Tool Set includes 1/4 in., 3/8 in., and 1/2 in. ratchets that all feature a low profile head and flush-mounted reversing lever for greater access. The sockets feature large hard-stamped part numbers and size on both sides of the socket allow for easier viewing of the socket sizes, and double lines (SAE) and knurled lines (metric) for easy SAE vs. Metric identification. Made of full polish, nickel chrome plated alloy steel, the sockets in this set are backed by a lifetime manufacturer's warranty. A must for any mechanics tool set. Ideal uses: automotive, industrial, repair, operations, and maintenance.