STANLEY 56-204, JACKETED FIBERGLASS ENGINEERING HAMMER, 4 LBS. IDEAL FOR STRIKING WOOD, METAL OR STONE. FIBERGLASS CORE ADDS STRENGTH AND DURABILITY IN THE HANDLE, REDUCES VIBRATIONS AND PROVIDES THE "FEEL OF WOOD". YELLOW-COLORED SHAFT FOR EASY PRODUCT VISIBILITY. EXCLUSIVE RIM TEMPER REDUCES INCIDENCES OF CHIPPING OR SPALLING.