Nupla 10063 48-oz. Extreme Power Drive Dead Blow Hammer, 48-oz. Extreme Power Drive Dead Blow Hammer, The Nuplacast 100% Cast Urethane Face Of The Extreme Power Drive Are Designed To Withstand The Most Severe Striking Applications, The Tough Bodies Of The Extreme Power Drive Feature Nuplas Patented Smart Hammer Technology: A Shot Loaded Cavity Which Delivers More Power & Less Rebound Than Any Hammers Referred To As Dead Blow Hammers, Extreme Power Drive Dead Blow Hammers Are Made In The USA With Nuplaglass Lifetime Fiberglass Super Grip Handles, Users Include All Industries & Applications For Heavy Duty Work.