Dotco 12-22 Series Heavy Duty Head Right Angle Grinders, 300 Series Collet feature ergonomic and durable composite housing. Dotco 12-22 Series Heavy Duty Head Right Angle Grinders, 300 Series Collet are designed with a heavy duty low profile head for greater accessibility. Dotco 12-22 Series Heavy Duty Head Right Angle Grinders, 300 Series Collet also feature a high output motor in a lightweight package. Dotco 12-22 Series Heavy Duty Head Right Angle Grinders, 300 Series Collet also have a 3” extended head available.