Dotco 12-20 Series Inline Grinders, 200 Series Collet are designed with ergonomic and durable composite housing. Dotco 12-20 Series Inline Grinders, 200 Series Collet are available with a front or rear exhaust. Dotco 12-20 Series Inline Grinders, 200 Series Collet are designed to work comfortably with the user, and are equipped a 200 series collet