This Facom Flexible Extendable Ratchet has a highly durable, dust proof and maintenance free head mechanism. 72 teeth provide a small working arc of 5° for precise work. The ratchet extends from 304mm to 437mm, and the length can be adjusted by one hand. The ratchet is locked at the desired length by a ball mechanism, with no risk of length change during use. The long plastic handle has a hook at its end for hanging and working at height. The ratchet is hinged for flexibility and to allow easier access in more difficult to reach areas. Specifications:Drive: 1/2in square.Length: 304 - 437mm.Head dimensions: 40 x 34mm.