Ground Rod comes in three different types of various diameter and length and has a cone
Point for easy driving.
The Plain Rods are used with ground rod clamps for proper electrical contact.
The Soldered type has five turns of #12 soft annealed copper wire soldered at the upper end.
The Electro-weld type has a 3/8 Inch round bar welded to the upper end portion of the rod.
Length and distance of pigtail from upper end of the rod.