I bought some of these to build some new nunchukas. The ones I got are not exactly like the picture, but almost. There is one hole in the base, not two opposite each other. They provide you with a roll pin to go into the hole to mount it on the stick. I used aluminum pop rivets instead. I also took one link off of the chain to shorten them. They use a roll pin to keep the chain on so that was very easy to do. The ball bearings were certainly good enough to do the job. The overall metal quality was heavy enough also. You cannot go wrong here.