This is another area where you can visibly see quality. Are the hammers nicely spaced? Are they all in line? Ask the salesperson about the hammer weight. Good pianos in a console size use about a ten to twelve pound hammer. Piano hammers are made of fine wool felt which is formed around a hard-maple hammer molding. First-grade piano hammers are made of two layers of felt; the outer layer is white, the inner usually purple, green or magenta.