This HP carbide bur is a round ball shape. It is 2.2mm in diameter. All LeBlond HP carbide burs have a 2.35mm (3/32") shank and are 44.5mm (1 3/4") in length. These US made carbide burs are designed for fast, smooth cutting and extended life. Availability: Usually ships in 2-3 business days 2.2mm Round Ball HPC300$7.00 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