GROZ 34521 Indestructible Handle Sledge Hammer with 6-Pound Head and 16-Inch Handle. Handle made with four large spring steel bars to prevent breaking during overstrikes. Head will never dislodge as the steel bars are locked with a steel plate to the top of the hammerhead. Head is induction-case hardened to 52-56 HRC max power and extended life. Ergonomic, vulcanized rubber-grip handle absorbs impact and vibration, reducing user fatigue. Grip made from a special grade ozone-resistant rubber for tough outside environments. With textured non-slip grip to help guard against user error. Great for driving in stakes, heavy demolition work in construction like fracturing stone and concrete, driving fence posts, rebar work, and bending or shaping metal. Also great for police fire and rescue applications as well as in railroad work. GROZ Indestructible Handle Hammers meet ANSI specifications "Hand Tools - Heavy Striking Tools Safety Requirements", as well as BS 876 specifications for material, hardness and performance. GROZ makes a wide selection of big and small hammers: sledge hammers, club hammers, engineer hammers, mallets, dead blow sledge hammers, and drilling hammers. 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 vibration and reduces fatigue Special bonding process ensures that the head never gets loose from the handle Hammer Head Available in 2 types: Heavy Duty 52 HRC Head or Soft Face 30 HRC Head MODEL NO - 34521