UNI valve gradated wrench
Design: Made of chrome-vanadium steel, hardened and nickel-plated, with cam hexagon socket and bi-hexagonal locking, square drive 1/2".
Size 3/8" 1/2" 3/4" and 1" and other intermediate sizes.
For the assembly and disassembly of heater valve nipples and lockshields as well as for short extension pieces.