This friction grip diamond bur is for gingival curettage. The head is 1.3mm in diameter at its widest point. The head length is 8.0mm. ISO maximum speed is 450,000 RPM. This diamond bur is made for air powered, high speed dental handpieces. Overall length of the bur is 20mm (3/4"). Shank is 1.6mm (1/16"). Available in a medium or coarse grit. Availability: Usually ships in 2-3 business days 1.3mm Gingival Curettage Long S2$3.45Grit: MediumCoarse Thank you for visiting A&M Instruments, Inc. Diamond Dental Burs. You will be pleased with the high quality of your dental burs and dental discs. All of our diamond and carbide cutting tools are made in the US, in Alpharetta, GA. Copyright® 2003-2011 A&M Instruments Inc 770-772-6404