What You Will Receive: there are 2 pieces of ground rod driver in our package, enough for your daily changing or replacements using; You can share the other one to those who are in need Suitable for Most Hammers: the hammer drill bits are suitable for 5/8inch & 3/4inch grounding rod, easy to use and install; They will bring you a nice using experience, saving your time and efforts Quality Material: the ground rod bit is made of alloy steel, which is impact resistant and provides rust and corrosion protection; The strong and sturdy material will provide you with long term using time Detailed Size: the hammer drill bit is about 1 inches/ 25 mm in the bottom diameter, and the suitable size is portable and handy to hold; You can carry to many that you need Colour:silver Material:alloy steel Size: Total Length: about 17cm; Outer Diameter: 2.5cm Package Contents: 2 x Ground Rod Bits Driver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.