Ideal for spark plugs that are sat down deeper in the engine and have restricted access. Includes an internal magnet to securely hold the spark plug in place during installation or removal. Universal joint with a rotating 360 head which is ideal when space is limited, allowing easier access than a standard socket. Thin wall design is intended for use with limited clearance for the spark plug. Manufactured from Chrome Vanadium that is hardened and heat treated for strength and durability. Standard depth socket 12-point 3/8"Sq drive 14mm. Knurled for easy grip with oily hands.