Show us your home made tools

Made a plasma torch track. For making long straight cuts. Runs with my cordless drill.
Made about 60 feet of cuts,worked great.
Its mounted to the back edge of a workbench so its out of the way. Leftover steel from a project and a long piece of threaded rod 1/2”. 0C6CDB0B-CCF8-4617-B822-23120400AC36.jpeg