A vibrator motor in a hair clipper has a stationary piece and a moving piece. The fixture of a dental implant with an improved structure in which the performance of osseointegration is excellent and spread of inflammation is reduced, and the method of manufacturing the fixture of a dental implant easily are provided. The trusted devices generate final private and public keys using the keying information. In a second mode of operation, the second rotary motor imparts linear motion to the output via a second screw connection.