Handpieces in general are the weakest link in drill and vacuum drill systems. The Lab Handpiece however, has proven itself in harsh environments, and is an extremely reliable unit. As your head ache is our head ache, where-ever possible, this handpiece has been incorporated in our drill, and vacuum drill systems. The handpiece also very versatile, and will work on many power supplies, and voltage and current ratings. It will work on power supplies with voltages ranging from 20v-35v, and currents ranging from .5 amp to 1 amp.