Here’s a nifty way to keep track of tools. My machine doesn’t have a tool changer, so I need to remember which register I’ve loaded the offset in the control for each one – basically a fancy sticky note. These are laser cut from formica which makes them pretty durable. Permanent marker works great, but it can be erased if you try hard enough, so they are also reusable. The center punches out to fit over the tip of different size tools; the main exception to that is big stuff like face mills. SVG file is attached below if you want to try this yourself.
Do they come in fuchsia or mauve?