Groz SF Indestructible Handle Club Hammer 2.5lb 1.1kg Radios Extension bars 3 4 square drive length: Tap & Reamer Wrenches Extension bars 3 4 square drive length: 200 400mm Total Harmonic Distortion (THD): 0 Bars are locked with the Hammer head using Steel locking plates ensuring that the head never gets dislodged Ergonomic rubber grip handle absorbs shock & vibration reducing fatigue Special Bonding process ensures that head never gets loose from the handle Hammer Head is forged from special steel & is Induction case hardened to 30 HRC for extended life Soft Face 30 HRC Head Forged from special steel the hammer head is induction case hardened & then tempered to reduce hardness to within 30 35 HRC Softer head is designed to mushroom when striking harder base materials