Gaugemaster OO Scale NEM Tension Lock Coupling (2) OO Gauge GM4910101 NEM Couplings designed for use on OO Gauge rolling stock. These couplings simply plug in to the NEM socket on the rolling stock and can be removed by pinching together the two legs and sliding them out of the pocket. TOP categories -- Scalextric Sets & Layouts -- Scalextric Cars -- Hornby Trains Sets -- LEGO -- Plastic Model Kits -- Sylvanian Families -- Tamiya RC Cars top brands -- Scalextric -- Hornby -- LEGO -- Tamiya -- Sylvanian Familes -- Playmobil -- Italeri INFORMATION -- Home -- About Us -- Payment -- Shipping -- Returns