About a year later this grinder just blew my mind. I'm a woodworker and have used (and probably abused) this thing quite a bit, so I'd say the lifespan of this tool was very reasonable for the price. I'm pretty picky when it comes to palm grinders so I'd say this grinder will last in the right hands for years with normal use. The biggest limiting factor for this grinder is the dust collection port/filter, which wasn't very reliable or durable. After only a few deflations, the seal never seated properly again. Also, I'd say dollar for dollar it's a good buy.
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