Made a quick marking gauge. Let's call it a prototype :)

It's surprisingly difficult making a precise square hole by hand.

The tip is one of the drill bit stubs I broke off the other day, ground to a sharp point. Never throw away good steel! It's stuck in tight enough not to move but can be pulled out with pliers for sharpening.

The locking bolt could do with a better handle, which I can weld on.

It works fine for now, but is a bit coarse.

#CoarseCarpentry #ToolMaking #DIY #Woodworking