Safety crab for e.g. climbing as a hook body with a finger mounted free on rotation around an axis of the lower end and with a stamped top end forming a cavity to receive the other hook end when the finger is in a closing position

摘要

Crab has a metallic body (12) shaped as a hook with a central space and a mobile finger (14) rotating around an axis (26) of the free end of the hook and being in contact with the other free end (22) when in a closing position. The finger is a U-shaped element obtained by cutting and plying of a metallic sheet. At the top end (30) the two arms have being stamped to form two bosses so that the top end of the hook can be forced between them.