Valve Wrenches can eliminate the possibility of a hand injury by supplying much needed torque to a valve wheel that is stuck or wont move. Manufactured in a wide number of styles and sizes, valve wrenches can be the right tool for the right job. They are made of aluminum, bronze and steel, with single and double-ended heads for a wider variety of applications. Steel tools are the most common material that they are made of. Steel valve wrenches are also the lest expensive tools when working on a budget. Aluminum and bronze tools are used when the chance of sparking is a safety issue. Aluminum wrenches are generally used in light duty applications, as where a bronze valve wrench is available in many larger sizes to compete with the steel tools versatility.