The Matco Tools 12-lb Black Formed Dead Blow Hammer, No. BFH12A, is made from high grade polyurethane in a one-piece construction using a bonding process and oven curing. The hammer is designed to be more resistant to cuts, splits and abrasions than plastic or rubber hammers. The tool also offers resistance to oils, solvents, greases, gasoline and ozone, the polyurethane head will not mar surfaces, with no sparks or rebounds.