A tender and body shell opening tool. This is a very thin credit-card like tool with one beveled edge. The tool is designed to facilitate easy opening of model railway rolling stock such as Hornby tender-driven locomotives, Diesels and Electric locomotives. You only need to print one for tenders, but for Diesels and Electric locomotives, we recommend you print off 3-4 so that you can easily hold the body shell clips open. You can also use this tool for opening coaches and scraping paint from surfaces.
This video from oorail shows why we came up with this product, how it was made, how its printed and how to use it: