Hitachis H45MRY Demolition Hammer with UVP (User Vibration Protection) is the first in its class with a dedicated anti-vibration mechanism. This UVP system combines counterweights and dampers to reduce vibration by over 50% and increase tool life by 30%. The H45MRY has an Impact Energy rating of 9.4 Ft-Lbs. The combination of less vibration, well-designed comfort features, and optimized striking performance adds up to unmatched productivity from the H45MRY.