1. High resistance special steel 2. 50-58HRC in impact area (ISO 15601) 3. Grey hammer tone finishing 4. Safety pin or conical go-through handle for per fect fixation handle-head. 5. Reinforced piece to avoid the breaka ge of the handle in its critical zone. 6.High quality wooden handle. 7. Conical wedge to improve the pressure distrution. 8. Ultra-resistant fiberglass. 9. Handle outer zone in PP and TPR: strength and adherence.