The face of this hammer is rounded, with beveled edges. The other end is a ball-shaped peen for metal working. These tools are used primarily for striking other objects, notably chisels, or to form sheet metal. This is necessary for heavy work on concrete, or for wood splitting in conjunction with a wedge. This device, used with a hammer, is for pushing the nail below the surface of the wood when you don't want it to show.
Nails range from the smallest, thinnest brads to large, weighty spikes.
Just be sure you are using the correct nail for the job at hand. Tips on Hammering To withdraw a long nail, place a block of wood under the hammerhead for extra leverage and to avoid marring the wood. Use safety goggles when hammering metals. Too often chips fly from steel chisels, or nailheads break off. Whenever possible, drive the nail through the thinner piece of wood into the thicker one.