I wanted this for a project. I have an HF rack for a drill press and wanted to make it mobile and adding wheels was the cheapest way. The kit included 2 nuts for each roller so I didn't have to buy them. I like the caster lock pedals, although I think they should have been a bit bigger as they are a bit difficult to flip to unlock. A larger pedal would give your foot more room for everyday grip. The roller shaft is about 1/4 inch thick and therefore strong. I would buy them again.