The ridgid heavy duty raprench wrench has a deeper and broader hook jaw housing that provides a smooth flat surface this surface is ideal for occasional use as a hammer graduations on hook jaw show approximated sizes of the opening for different pipe sizes and there is a knurled adjustment nut for easy one handed operation there is a large flange that prevents the nut from being inadvertently rotated when wrench is set down it has a sturdy cast iron housing with a i beam handle with full floati