Abstract: A wrench or one way drive has a flexible head (2) with a split aperture (20) for loosely engaging a separate drive such as a socket or the head of a fastener (31) including a nut, bolt, screw or the like. Cam means, preferably pins (11,11a), are located on a handle (3) and engage the head (2) preferably through slots (21,22) in the head. The slots diverge outwardly so that as the handle is moved relative to the head the split aperture (20) closes and the flexible head (2) increasingly clamps a drive socket as more torque is applied to the handle.

Abstract: There is disclosed a fold-away wrench having a wrench head (9) pivotally mounted on a handle (2). The wrench head (4) is an open flexible ring socket (3a) locatable over a fastener such as a nut, bolt or screw to move it. Pins (17) are provided for engagement with the wrench head (4) to close the wrench head over a fastener to be moved. Preferably, the wrench head (4) is pivotable on an axis pin (10) at one end of the socket ring while at the other end of the socket ring is a fulcrum pin (17) for closing the socket over the fastener.