Wireless Electric Engraving Pen for Glass & Metal - Precision Engraver Tool for DIY, Jewelry, Crafts, Surface Etching, With diamond grinding head and K-tip (Compatible with Multiple Materials) (Black)

If you have a grinding pen with a cutting disc bit you can cut a groove for a flat head screwdriver. You can get a grinding pen with tons of bits on amazon for like $20. Just make sure it comes with a smooth cutting disc, not a saw blade. https://a.co/d/03lTD0WH