Good quality. They are made by just one company so it's nice that they produce quality. If you've never used Miller's dowels, take the time to examine them. They are great for some things and can be incorporated into an item with an aesthetic touch. They should connect power like screws. I used them to attach the top of the maple top to the piece and I can honestly say it's rock solid and won't go anywhere. They may not be the best for every situation, but they are the best for some. Look at her.