This Monument 781T DIY Telescopic, Adjustable, Plumbing Basin Wrench is designed for use when tightening or loosening nuts in awkward positions, particularly those underneath basins or baths.The teeth on the jaws will grip uneven shapes as well as pipes, hexagons, squares etc. The swivelling head allows access where fixed spanners will not operate. Specification: Telescopic Shaft extends from 25 - 43cm.