This HP diamond bur is a flat end taper. The head is 1.0mm in diameter at its widest point. The head length is 4.0mm. The ISO maximum speed for this diameter bur is 100,000 RPM. Overall length of the bur is 44.5mm (1 3/4"). Shank is 2.35mm (3/32"). Available in a medium grit. Availability: Usually ships in 2-3 business days 1.0mm Flat End Taper HP845-010$5.95 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