SANDENT High Speed Handpiece. Every feature of STNABM handpieces is precision engineered to deliver enhanced performance with the reliability and durability SANDENT users expect. Speed: 380,000480,000 min-1. Head Size: ø10.3 x H13.5 mm. The sale of this item may be subject to regulation by the U. Food and Drug Administration and state and local regulatory agencies. You feedback is VERY important to us! We strive to exceed all your expectations and put a smile on your face. We stand behind our products and pride ourselves on OUTSTANDING customer service.