Screwing or unscrewing device for use by blue-collar worker e.g. plumber on building site for screwing or unscrewing collars, has two upper supports ensuring alignment and stability of collars around axis

摘要

The device has a concave push surface positioned in an inner side of a point of a ring (5) at a bottom side. Two contact side points (4, 6) ensure the transmission of torque when the contact side points are placed at the bottom side of the ring. Two upper supports (2, 3) ensure alignment and stability of collars (26) around an axis. A rectangle tail (1) is tightly positioned between two consecutive jaws and attached at an end of a third jaw. Floors are compatible with sizes of the collars. A large fork is carried with respect to the sizes of collars.