Three wrenches specifically designed to tighten the packing nuts on non-condensing pumps. Manufactured out of stainless steel. Openings are 7/8", 1-1/2" and 1-3/4".
These packing nut wrenches are designed for Stanley pumps only and not for engines. A properly packed pump should be tightened hand-tightened until the packing feels solid. If the pump leaks, then further tightening with these wrenches is used. A 60o or about 1/6th of a turn at a time is all that is needed to properly compress the packing material. If the pump continues to leak after two or three applications of this process pump packing is probably used & in need of replacing. Other valve components may be worn or damaged.