HO Scale Kadee #9 Metal Couplers w/Gearboxes Medium (9/32") Centerset Shank
Truck Talgo Mount Coupler for Early Tyco Metal Trucks & Craftsman Kits
Metal Coupler with insulated Draft Gear Box and Lid, bronze Centering Spring and side and smaller center screw mounting hole used for truck mounting situations, similar to NO.5® Coupler.
It is not recommended to use a metal coupler directly on a metal surface or in a metal draft gearbox to avoid possible electrical crossover and shorting that may cause damage