Handpiece designed to provide extra power to cut through modern materials like solid zirconia crowns. Larger head is 11.9mm diam. by 13mm high. Deeper chuck is ideal for accommodating side load force from 25mm length burs. Diamond-Like Carbon (DLC)-coated ceramic bearings are protected by a dynamic speed-control feature in the head. Free speed is limited to approximately 370,000 rpm. Titanium coating on grip and sheath enhance tactile control and maximize scratch and chemical resistance. 2-year warranty, extra 6 months when maintained by Midwest Automate.