The truly remarkable 34oz. Wood Worker series Dead Blow Hammer is cast from a special cut resistant urethane, which allows this hammers rectangular face to be struck amazingly hard against both finished and unfinished wood surfaces. These hammers can be used during assembly operations and on wood projects without causing damage to those surfaces, profiles or finishes being struck. Dead blow performance means work pieces that are struck together stay together. The 34oz is the perfect weight for most jobs around the wood craftsmans shop!