Kadee KAD205 Coupler Height GaugeOur Products are named for its high standard durability stability and trust among our user We are working to provide our users with the biggest and best selection We maintain a commitment to growth and realizes that the HEART of its future success You can find a wide range of model trains railway sets here and browse the best products from usFeatures. Provides instant visual reference of proper coupler height 2. Accurately measures proper trip pin height above rail 3. Builtin HO track gauge 4. Movable dowel tests Kadee MagneMatic Uncoupler height and registers the needed adjustments Metal gauge body and couplersProvides instant visual reference of proper coupler height 2Accurately measures proper trip pin height above rail 3Builtin HO track gauge 4Movable dowel tests Kadee MagneMatic Uncoupler height and registers the needed adjustments MetalProduced with the highest grade materials