Adjustable Laser Cutter Focus Guage

This is a free standing adjustable gauge I made for focusing my Boss 100 watt laser cutter/engraver. The insert is adjustable up or down. Fully inserted with the thin end up the laser focus is 2", with the broad side up the focus is 1 1/2" Eventually I will make another insert section with a threaded hole for a set screw for fine adjustments. The broad base makes it a superior tool than the standard gauge that came with the laser.