EDS Handpiece Service EDS warrants the handpiece against poor manufacturing, poor workmanship and defects in materials. EDS and/or its agent will analyze and determine the cause of any problems. Warranty will be voided if the handpiece is not properly maintained or used correctly. EDS warranties the handpiece for 6-months from the date of purchase. Non-warranty service will be billed via your dental distributor. All handpieces must be processed through the proper autoclave sterilization prior to return. To obtain return authorization please complete the form below and attach a copy of your distributor's invoice.