Manufactured from hardened and tempered Chrome Molybdenum steel. Easily extract nuts, bolts and screws that are rusted, worn, painted over, or even completely stripped or broken. Slim design well-suited for tight access and recesses where traditional hex extractors do not fit. Internal thread with reverse spiral flutes has a good grip on damaged bolts, providing excellent torque. Includes standard 1/4"Sq and 3/8"Sq Drive head hex adaptors, allowing the use of hand, air, or power tools. Includes a knock-out pin for easy removal of damaged bolts once removed. Supplied in a durable storage case for easy transportation.