Less Rebound, Greater Control – Steel shot inside the hammer head reduces rebound, Durable Outer Jacket – Hot cast polyurethane jacket is highly resistant to chipping, cracking, and tearing, Ball Peen Hammers – The flat and ball peen sides of the hammer heads are made from 4140 Cr-Mo steel heat-treated to 52 HRC, Nonslip Grip – The textured handle surface provides a comfortable grip for hammering, Multiple Hammer Lengths – Shorter and longer handle options provide additional access and leverage.