Armstrong 12-996 1/2-Inch Drive Indexible Ratchet Made in the USA - Quality and Availability 11-Position Locking Indexible Head maximizes safety and maintains position for multi-angle, multi-application use regardless of load Strip proof locking mechanism engages with 18 pins for strength Locking mechanism is easy to operate  push button, set and release Unique Hour Glass handle design has a concave shape conforming to the grip of the hand which reduces fatigue and improved comfort