These are a great spur.
We dismantle these when they come into the workshop;
We oil the straps, then re-assemble them... making sure the rowels spin freely and we Loctite the screws, so they are ready to use.
These spurs are much kinder and less harmful to your horse without sacrificing effectiveness or performance.
Due to the side rolling rowels, they are much less likely to scrape than vertical rowel spurs.