An engineer's hammer, also known as drilling hammer or a baby sledge hammer, is a tool used for heavy hammering or demolition work. An engineer's hammer weighs from one to five pounds. It has handle that it about 8 inches long – much shorter than that of a normal sledge hammer – made of wood, fiberglass, or steel.
The heaviness of the engineer's hammer makes driving heavy spikes or wedges easier than using a lighter carpenter's hammer. Its short handle allows more control and for it to be swung in spaces where there's insufficient room to use a hammer with a longer handle.