Abstract: A fingernail shaping instrument in the form of an orbital sander having a head containing an eccentrically mounted weight, a drive unit containing a drive motor, a coiled tilting spring interconnecting the head and drive unit such as to permit orbital motion of the head relative to the drive unit. A separate coiled drive spring interconnects the motor and the weight.

Abstract: A vibrator is prevented from transmitting its vibratory motion to the vibrator holder, such, for example, as a handle, by interconnecting the vibrator and handle with a spring arranged so that the spring serves as a resilient cantilever. Amplitude of vibrations are enhanced without a corresponding increase in the amount of vibration transmitted to the handle by arranging the resilience of the spring and the mass of the vibrator to be resonant at the frequency of vibrations or at a submultiple of those frequencies.