Yes...like any tool it must be maintained. In time the face of the hammer head changes shape from enumerable impacts. If you use one hammer for all of your hammering desires it will show in its shape. From tack hammers to framing hammers they all have weight, shape, and handle length characteristics pertaining to there function. A rounded and worn hammer will let a nail head slip out and bend almost every time. Make sure your head is not loose, and your face is plane.