-For use with the EGRD Ground Rod Driver -Inserts are interchangeable with standard ground rod driver bodyPart Number EGRD58I Ground Rod Diameter, Nominal 5/8" Ground Rod Diameter, Actual 0.56" Max Unit Weight 6 lb Certifications Qualifoudre Standard Packaging Quantity 1 pc UPC 78285635449 EAN-13 8711893017540