XT HMMR 22OZ FRMG Patented torsion control grip technology reduces the effects of torque on wrists and elbows Patented AntiVibe technology minimizes vibration and shock at impact Patented torsion control grip technology reduces the effects of torque on wrists and elbows Patented AntiVibe technology minimizes vibration and shock at impact Magnetic nail start feature for extended reach and one-handed nailing capability Checkered face design increases control and accuracy when driving nails. Precision balanced – feel the difference Limited lifetime warranty