This Kadee insulated coupler height gauge kit is a must - have for HO scale model train enthusiasts. It's easy to assemble and use. Comes with #148 & #158 Scale Whisker® Couplers. Ideal for gauging mounting height, correct coupler height, trip pin, and permanent uncoupler heights to ensure smooth coupler performance. Also features a built - in HO track gauge, taking the guesswork out of your model building.

Using this coupler height gauge is a breeze. First, assemble the kit by following the simple steps. Once assembled, you can use it to measure the mounting height of your couplers, the correct height of the couplers themselves, the trip pin, and the permanent uncoupler heights. Just place it on the relevant parts of your model train and take the measurements. When using the built - in HO track gauge, align it properly with the tracks. As for maintenance, keep it clean and dry. Avoid dropping it or subjecting it to rough handling as it may affect its accuracy. If it gets dirty, you can gently wipe it with a soft, dry cloth.