PETOL VALVE WHEEL WRENCHES are designed for added safety when opening and closing stubborn valves.  This spanner has a patented feature which fits over a spoke of the valve wheel to minimize the chance of the wrench slipping off the wheel when force is being applied.  Additionaly, the base pad for these spanners has been improved by a deeper, more rounded design for a better fit on the valve wheel rim. This improvement also reduces the chance of the wrench slipping. Finally, the handle has been designed to provide the worker with a safer, more comfortable grip.  This series of spanner wrenches are made from aluminum-magnesium and come in three sizes to fit a wide range of valve wheel diameters.