The ratchet - the key item. Made from CrV steel in one single piece. 4 - 14mm sockets 1/4" drive (6.3mm). Includes 16 high quality alloy Allen key bits and adapters for male hex and square bits (magnet to socket adapter) and female hex and square bits (ratchet to screwdriver bit adapter) and 1.25 - 1.5 - 2.0 - 2.5 and 3mm angled Allen keys.