Diamond coated cylinder. Available in a coarse grit. Shank is 1/8" in diameter. Overall length of the tool is 2 1/4". Head diameter is 3/16" (0.187"). Head length is 5/16" (0.312"). Excellent choice for detail work on glass, stone, metal, ceramics, porcelain, and hardwoods. Manufactured in USA. 0.030" Diameter Cylinder $14.25 0.040" Diameter Cylinder $14.25 0.062" Diameter Cylinder $14.25 1/8" Diameter Cylinder $14.25 3/16" Diameter Cylinder $14.25 1/4" Diameter Cylinder $14.25 5/16" Diameter Cylinder $28.25 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