Dotco 10-27 & 12-27 Series Heavy Duty Head Right Angle Grinders for Type 27 Depressed Center Wheel feature ergonomic and durable composite housing. Dotco 10-27 & 12-27 Series Heavy Duty Head Right Angle Grinders for Type 27 Depressed Center Wheel are designed with a durable low profile angle head. Dotco 10-27 & 12-27 Series Heavy Duty Head Right Angle Grinders for Type 27 Depressed Center Wheel also feature low vibration and a high output motor that provides superior productivity.