Stencil Cap 3mm, a tool that makes it possible to get extremely thin lines! Now it also has a larger ring that collects leftover paint so you don't get it on your hands and clothes. Use gloves.
Best results are obtained if you remove the color ring (doughnut) before snapping the Stencil cap onto it.Use a small chisel or similar to remove it easily. After use, wipe off the remaining paint and you can reuse it.