Indestructible handle is made up of (4) spring steel bars that run all the way through the handle; Bars are locked with the hammer head using steel locking plates ensuring that the head never gets dislodged; Ergonomic rubber grip handle absorbs shock and vibration reducing fatigue; Special bonding process ensures that head never gets loose from the handle; Hammer head is forged from special steel and is induction case hardened to 52 to 56 HRC for extended life