A.M. Leonard Dead Blow Hammers use hot-cast polyurethane. Unlike cheap plastic models, the faces of these hammers are convex. This model measures 14-3/8 inches in length and weighs 2.8 lb. Leonard Dead Blow Hammers feature a single-piece heat-treated steel interior. The steel canister inside the head contains steel shot. This free-flowing shot creates a dead blow effect when the hammer strikes a surface. The steel interior extends into the handle, increasing its overall strength. We equip the handle with a slip-resistant grip. Our Dead Blow Hammers increase your striking force by up to 40%. The dead blow effect nearly eliminates rebound, reducing user fatigue. The non-sparking, non-marring polyurethane jacket minimizes damage to the striking surface. The poly material resists damage caused by certain chemicals. Their single-piece steel interior acts as a skeleton to provide overstrike protection. Leonard Dead Blow Hammers outlast other rubber and plastic hammers by thousands of strikes. Their convex striking faces resist cracking, chipping, and splitting. The steel-reinforced handle withstands even the most severe blows. These features combine to make these hammers effective and virtually unbreakable. Made in the USA and backed with a limetime warranty!