This made it easy to fit the gasket onto the outer axle and then in turn put the axle back into the banjo hub. When you consider how much money you can save by doing it yourself, the tool is a steal even if you never use it again. I've seen people online make PVC tools or pipe flanges and nipples (with loops) but I can tell you it's reassuring to have a tool that fits and you can really thresh and I'm sure that the work becomes smoother. At least one of my seals required a decent amount of power, and you don't want to break the seal with the wrong tool.