Hornby Track Single 1x R617 Uncoupler. This spring-loaded ramp clips into straight track at the position you choose, and automatically lifts couplings when the train is halted over the ramp. This set includes a marker post to help you align the coupling with the ramp underneath. Scale - (gauge): 00. It is made from small parts. Automatically lifts couplings when the train is halted over the ramp. Spring-loaded ramp clips into... This may come without Hornby packaging. All our items are very well protected for posting. Expand your layout, see more items. ACCESSORIES, PLATFORMS, TRACK, BRIDGES & TUNNELS, SKALEDALE. 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 Families, Playmobil, Italeri. INFORMATION: Home, About Us, Payment, Shipping, Returns, Contact Us.