Miller Dowels Mini-X
When things go wrong in the shop, one of the crutches I lean on are Miller Dowels Mini-X thingies. These are stepped and ribbed dowels that you install with a super-insanely-good stepped drill bit. How to use them: First drill a hole with the bit to reinforce a questionable joint. Then tap in a Mini-X dowel with some glue.
They fit so well that the world seems like a brighter place.
I’ve long used Miller Dowels for a variety of off-label applications, especially knockdown joinery. But as I delved deeper into chairs, I have found that the Mini-X dowels are the perfect repair tool. They can go almost anywhere. The fit is perfect. And they can be easily flushed to look like nothing ever happened.
If you are Miller-curious, buy the Mini-X Dowel Joinery Kit for $35. It includes the drill bit (the most important part) and 100 birch dowels. Put the kit somewhere safe but visible. The next time something goes circling around the toilet bowl, remember this kit. It might save the day.