WARNING: Make sure you wear eye protection when you use this rock hammer. My son has become an avid fossil hunter and we often return from the beach and hikes with 5-10 pounds of "fossil rock". He used other rocks or my hammer to smash the rocks, risking breaking his fingers and/or ruining my hammer. So we went pro with this one-piece 14-ounce Estwing rock mallet. The perfect weight for the little guy, a comfortable grip, a tool designed for rockhounds and a tool he's proud of and calls his fossil hammer.