This paper proposes a compact handheld device for magnetically inserting a neural interface into a peripheral nervous system (PNS). Users can pull and hold a flexible peripheral nerve (e.g., sciatic nerve) at the front of the device for the accurate and stable targeting process. The device automatically inserts a neural interface using magnetic impacts that are generated by a miniature motor and a pair of magnets. We investigate the characteristics of the employed mechanism, and present the preliminary experimental results.