RK-TC-5075 (Ames-Deringer) | Test Cock | For Deringer 0.50 x 0.75This Test Cock Wrench Was Designed For The Tamper Resistant Test Cocks on The Deringer Models. The Test Cock Wrench is Made of 10GA Steel And Was Engineered to Work With All Valve Sizes With One End Capable of Opening And Closing The 1 2 Inch Ball Valves on The 2 to 4 Inch Valve Bodies. The Other End Works With The 3 4 Inch Test Cocks Found on The 6 to 8 Inch Valve Bodies. Ames Deringer RK TC 5075