The carbide cutting edges are precision machined to cut faster, and last longer with less heat buildup. Carbide head is 0.087" (2.2mm) in diameter at its widest point. Head length is 0.098" (2.5mm). Shank is 3/32" (2.35mm) in diameter, overall length is 1.751" (44.5mm). Manufactured for medium speed rotary carving tools (up to 45,000 RPM). Excellent choice for detail work on hardwoods, steel, other ferrous metals, plastics, and fiberglass. Manufactured in USA. Availability: Usually ships in 2-3 business days. HPC500$5.29 Thank you for visiting A&M Instruments, Tools and Machining. Please e-mail any suggestions or comments to improve the site, our service, or tool selection. Always wear proper eye protection and gloves when using any cutting or grinding tool. ALL diamond tools last longer if a lubricant or coolant is used during cutting or grinding. Copyright® 2002-2006 A&M Instruments Inc 1-866-264-4287