UNI step wrench with ratchet
It is used for the installation and removal of male thread (nipple) connectors of heating valves and short valve extensions. Made of chrome vanadium steel, hardened and nickel-plated. 1/2 square drive pin" Advantages Universal application: external and internal Christmas trees and 12-angle mandrel sizes 3/8", 1/2", 3/4",1" Special design does not cause jamming in nipple and screw fittings Replacement and removal of nipple connectors of heating valves, bottom cut-offs on radiator returns and short valve extensions 1/2 "with ratchet makes installations quick and easyDo you need help? Do you have any questions?Ask a question and we'll respond promptly, publishing the most interesting questions and answers for others. 
