ImpressArt Brass Head Ergo-Angle Metal Stamping Hammer (1 Pound) Ergo-Angle developed for comfort and leveled-striking when metal stamping 1 LB (one pound) top-weighted, ideal for deep, crisp markings Brass head eliminates double impressions caused by steel hammers Brass head is a replaceable product (SC721-R) NOTE: before use, tighten brass head with pliers to ensure it's secure on hammer