Contains spark plug sockets, screwdriver bits with square drive for slotted, Phillips, TX (with frontal hole) and Allen sockets, and angled Allen keys. The ratchet is the key item, made from CrV steel in one single piece. It is hardened with perfect toothing; several of the 52 teeth engage simultaneously for transmitting extremely high torque. The quick release mechanism allows for releasing sockets at the push of a button. It comes in a sturdy, welded steel box, powder coated for durability, with distortion-free, indestructible trays made of injected polypropylene. The product is oil and acid resistant and easy to clean, featuring easy-to-read and durable markings of all socket sizes.