This Rothenberger Multi-Purpose 4-way key is a versatile and practical tool for various plumbing tasks, offering an alternative to using spanners, wrenches, or grips. Its precision-machined finish ensures a snug fit to fittings, and the 'cross' design provides enhanced torque for stubborn valves or locks. Constructed from solid brass, it accommodates 1/2", 3/4", and 1" radiator valves, gas and water meter boxes, and most drain-off valves. This essential, pocket-sized tool features a cast-in size guide for convenience.