The ATD Tools 3-pc Indestructible Handle Hammer Set, No. ATD-14033, features spring steel bars through the length of the handle. The bars are locked with the hammer head using steel locking plates and a special bonding process to ensure that the head never gets dislodged, the company says. The handle has an ergonomic rubber grip that absorbs shock and vibration, reducing fatigue. The hammer head is forged from special steel and is induction case hardened for extended life. The set includes 32 oz. Ball Pein Hammer, No. ATD-4047; 2.5 lbs Cross Pein Hammer, No. ATD-4063; and 4 lbs Sledge Hammer, No. ATD-4064.