Dotco 10-10 Series Inline Grinders, 200 & 300 Series Collet are designed with durable aluminum housing, and are compact in size for ultimate control and easier access to hard to reach areas. Dotco 10-10 Series Inline Grinders, 200 & 300 Series Collet are ideal and work best for die and mold work as well as deburring and feature a comprehensive selection of speeds available.