The Crescent mechanics tool sets are professional tool sets contain tools for industrial jobs. They come with durable, full polish chrome alloy steel ratchets, drive tools and sockets that are reliable and resist rust and wear. Also included in the CTK70C are: full polish combination wrenches, bits and hex keys. The heavy-duty blow-molded case with a designated spot for each tool. Contains a carefully selected assortment of hand tools needed for most industrial, mechanical and consumer applications. 72-tooth ratchet requires only a 5° swing arc to turn a fastener. Quick release allows for fast socket exchanges. Sockets feature off-corner loading technology to virtually eliminate fastener rounding. Manufactured from chrome alloy steel for better strength and longer tool life. Bright, full polish chrome finish easily wipes clean and resists corrosion. Ergonomic dual material bit driver for added strength and leverage fastening bits. Includes blow mold case for storage and organization.