Hitachi's new series of 7" and 9" angle grinders employ "User Vibration Protection" or UVP to help reduce the amount of vibration passed on to the user. A moving joint mechanism in the handle paired with handle dampers work with the flexible switch and side handle features to form the UVP system which can reduce user vibration by more than 30%.
More details below...
Features
User Vibration Protection or UVP pairs a moving joint mechanism with a handle damper to reduce the amount of vibration passed on to the user
A Flexible switch and side handles reduce full-load tri-axial vibration by up to 30%
A new two part stator coil uses 1.5 times the surface area for 25% cooler operation
A new gear structure pairs a high accuracy moving joint and coupling dampers to reduce noise by 60%
Specs
Amps: 15
Rating: 120V AC/DC
Watt Input: 1,700
Watt Output: 1,110
Max Watt Output: 3,500
Wheel Diameter: 7"
RPM: 6,000
Full-Load Tri-Axial Vibration Main Handle: 3.3 (m/s2)
Full-Load Tri-Axial Vibration Side Handle: 4.8 (m/s2)