Kadee Insulated Coupler Height Gauge Kit. It comes with #148 and #158 Scale Whisker(R) Couplers (HO Scale), Part # 380-206. Super easy to assemble and use! It includes the No5® Coupler and #58 'Scale' Coupler. This is a must - have tool. It helps you gauge the correct coupler height, trip pin height, and permanent uncoupler height for smooth coupler performance. There's also a built - in HO track gauge. It's a multi - purpose gauge that 'takes the guesswork out'. It combines four tools in one: 1. Gives an instant visual check of proper coupler height. 2. Measures the correct trip pin height above the rail accurately. 3. Has a built - in track gauge. 4. A movable dowel tests Kadee® Magne - Matic® Uncoupler height and shows needed adjustments.

Using this Kadee Coupler Height Gauge is a breeze. First, take a look at the visual reference part to quickly check if the coupler height is correct. Then, use it to measure the trip pin height above the rail precisely. For the track gauge, just place it on the track to see if it fits well. And when it comes to the movable dowel, use it to test the Kadee Magne - Matic Uncoupler height. If there are any adjustments needed, the gauge will show you. As for maintenance, keep it clean and dry. Avoid dropping it or exposing it to extreme temperatures. If you notice any parts are loose or damaged, don't use it and contact the seller for replacement parts.