Driving Head, M22Features: Driving head, steel Full-threaded bolt with internal hexagon screwBolt grade 129, made of high strength steel alloy, reusable Suitable for heavy-duty construction, metal-to-metal bolting, have high tensile and yield strength It has excellent stability at high or low temperatures and provides resistance from various chemical and physical reactionsThe driving head is used for ground rod deep blowThread standard M22For use in grounding and lightning systems, can also be used in transport, agricultural machinery, etcSpecifications: Material: steelGrade: EG 129Screw type: M22Head: hex 14mmRod diameter: 20mmLength: 58mmOuter diameter: 28mmWeight: 220g