Dotco 236 Series Heavy Duty Head Right Angle Grinders, 200 Series Collet are designed with rugged and durable aluminum housing. Dotco 236 Series Heavy Duty Head Right Angle Grinders, 200 Series Collet are designed for heavy industries including shipbuilding, foundries, and metal fabrication. Dotco 236 Series Heavy Duty Head Right Angle Grinders, 200 Series Collet feature a robust angle head design that provides excellent durability.