The Rothenberger Multi-Purpose 4-Way Key is a very handy and practical tool for a wide range of plumbing applications which would normally call for a spanner, wrench or grips to be used, which can be quite long, inaccessible and sometimes damaging. The precision machined finish allows a neat fit to the fitting that needs turned and the "cross" design allows for added torque for dealing with tight or seized valves or locks. This product is most commonly used for 1/2", 3/4" & 1" radiator lock-shield valves, gas and water meter boxes and most drain off valves.