This friction grip diamond bur is ball shaped and is 0.9mm in diameter. Identical to the A0.5 except the shank length is longer. The 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 25mm (1"). Shank is 1.6mm (1/16"). Available in a medium or coarse grit. Availability: Usually ships in 2-3 business days 0.9mm FG Round Ball Long Shank #801LS-009 A0.5LS$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