JET 4 Lb. Head, Unbreaka Unbreakable Technology - Steel core eliminates breaking during overstrikes Hi-Vis Head - Drop forged 46 HRC steel head endures the most demanding applications Safety Plate - Secures head to handle preventing head dislodging Ergonomic Handle - shaped and thickened for improved comfort and less vibration No-Slip Grip - Vulcanized rubber handle for secure grip while striking