1 Pcs Round Diamond Dresser Pen. This round head diamond dresser is a common trimmer of the grinding wheel of your grinding machine. 3/8''/ 9.4mm Diameter; 2"/ 53mm Length. The point of the set diamond is concentric with the shank. Ideal for truing up your grinding wheel in quick and easy process. 0.50 carat. Single Point, preferred quality, repeatable dressing performance, consistent diamond structure and shape, well defined, sharp point diamond. It is applied to the precision truing of grinding wheels with large diameter and large particle size for grinding machinery, and also to the truing of plain grinding wheels. Made in India.