I bought this a few years ago but only now found the time to upgrade it. This is probably for the best as I can tell the whole block is very solid. I was a little worried the brushes would fall apart but they lasted about 15-20 washes pretty well. It fits perfectly in my BMW's nut hole and makes cleaning those holes a lot easier. Don't hesitate to invest in one of these brushes if you wash your car yourself (and really want to clean the rim completely), even occasionally, as other brushes have a hard time getting into those gaps between the nuts.