The Stanley 20-Ounce FatMax Xtreme AntiVibe Rip Claw Framing Hammer features patented torsion control grip technology that reduces the effects of torque on wrists and elbows. The included AntiVibe technology minimizes vibration and shock at impact, making this an ideal hammer for professional all-day use. Also included is a magnetic nail start feature for extended reach and one-handed nailing capability.