NTI designs and manufactures hammer union wrenches. These wrenches can make and break hammer unions with a handle for increased safety. A hammer pad is available to use with a sledge hammer. The wrench protects the hammer union wings from being damaged by a hammer. Hammer union wrenches can be made for any size of the union both new and used. They are available in all sizes and come with a Phosphate finish. The hammer union wrench is patent pending.