• Powerful 1 HP Die Grinders are excellent for optimised results in heavier applications. Lower speed machines feature an offset gear box for higher torque. • The 0.5 HP models feature a high output air motor. This provides high torque performance resulting in constant speed under load for optimum performance of abrasive product. The 4,000 RPM tool features a planetary gearing system for increased torque. • Choose the extended shaft grinder where extra reach is needed for cylindrical polishing, buffing and deburring applications