One piece forged construction with patented antivibe technology. The Stanley Fatmax AntiVibe lump hammer has been designed with a one -piece forged construction for strength and durability. The patented antivibe technology reduces vibration transmitted to wrist and elbow. Ideal for use in confined work areas with little room for a full arc-swing. The wide face makes it ideal for striking chisels and punches. This club hammer is designed for use in confined spaces with little room for a full arc swing. The head material is steel and the shaft material is also steel. Weight is 1300g (3 lb).