Ergonomic design - ergonomic handle design helps reduce user fatigue, lower vibration and improve efficiency Forged head - 12-pound hammer head is forged from durable alloy steel and is induction case hardened to 50-55 hrc Indestructible handle -indestructible handle has 6 spring steel bars that run all the way through the handle under the rubberized overlay Locked head - steel locking plates and special bonding process locks the head in place and ensures that it never loosens Vulcanized rubber - vulcanized rubber handle overlay is ozone resistant for use in tough outside environments