Swift, tiny scissors -[ HMM ]-

A beard and mustache trimmer in action. The trimmer is similar to hair clippers commonly used by hairstylists, but with a finer-toothed cutter assembly and, instead of a vibrating electromagnetic drive in older models, a motor using a cam pin to smoothly convert rotary motion into the cutter's oscillating motion.

 

The cutter assembly is one inch (25.4mm) wide.

Done