Rounded end taper. The diamond coated head is 1.0mm (0.039") in diameter at its widest point. Head length is 4.0mm (0.157"). Available in a medium grit. Shank is 2.35mm (3/32")in diameter, overall length is 44.5mm. Manufactured for medium speed rotary carving tools (up to 100,000 RPM). Excellent choice for fine detail work on glass, stone, metal and most hardwoods. Manufactured in USA. Availability: Usually ships in 2-3 business days HP849-010$5.95 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® 2002-2011 A&M Instruments Inc 770-772-6404