The gear mechanism moves the head in 180 degress increments both forward and back giving you a full 90 degress each way. The mechanism uses a hard wearing spring in the head which holds it`s place on the angle set. Manufactured from the highest grade Chrome Vanadium Steel. Highly polished with forward and reverse gears on the ratchet head. Telescopic from 348mm to 488mm giving you that added distance for those hard to reach nuts and bolts. The fine toothed mechanism in the head clicks at 5 degree increments for a total of 72 teeth. This helps in confined spaces when tightening or loosening nuts and bolts. TRP grip (thermoplastic rubber) which allows a nice soft but firm grip. Specification: 1/2 inch square drive. 72 teeth. 5 degree increments. Telescopic Length: 348mm - 488mm. Flexible head - 1/2 inch forward and back. Highest grade Chrome Vanadium. Forward and reverse selector. Highly polished. TRP grip.