This friction grip diamond bur is a flat end cylinder. The head is 1.2mm in diameter. The head length is 5.5mm. 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 21mm (3/4"). The shank is 1.6mm (1/16"). Available in a medium or coarse grit. Packaged in boxes of 25 each. The minimum order quantity is one box of 25 pieces. Ordered in multiples of 25. Quantity discount for orders of 100 pieces or more. Availability: Usually ships in 2-3 business days 1.2mm Flat End Cylinder D3$1.15, 100/$105.00Grit: 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