The original “Footprint” wrench. This traditional plumbers tool is an all purpose wrench and by means of the hardened fulcrum bolt, grips the workpiece tighter as more pressure is exerted. Known as the “universal shifters”, “footprint dogs”, "footies" or “thank yee God’s”. The screwdriver type end is useful for a number of different applications.
Invented in 1875, still made by the original company in Sheffield, England.