
I needed a 0.9mm allen wrench for an RC car gear grub bolt and thought I'd get it for general use buy it if it is suitable. In general, they will get the job done as long as it's not too strenuous or critical. The alloy and plastic finishes aren't great, but are on par with what you'd expect from a set this cheap. The size of the bit is stamped on the end of the handle, which is very convenient. The only major complaint I have is that the actual milled portion of the shank (where the hex bit is located) is a tiny fraction of the entire shank. And on very small bits, probably no more than 1-2mm deep. This makes it almost impossible to use if the screw is countersunk at all (which it was in my case).

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