I like this idea but it could be improved. The set screws have flat ends which causes the device to slip from time to time. If they had a ridged surface or a point, the purchase would be much more durable. This is kind of a bear to tune into. Especially for little fans. Other than that it's a good product and I love having it in my tool arsenal. I've used it many times and only had problems with very small fans.
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