Stainless Steel 1/2" Antenna Mounting Hole Fits Most Truck Bed Stake Holes Rubber insert expands in stake hole by tightening nut making a tight fit. Rubber Padding protects vehicles painted surface Includes copper grounding wire w/lug 6" L x 2 1/4" W x 2" H Add a FireStik K4 Antenna Stud shown at right or a FireStik K4a Antenna Stud to your purchase for the antenna of your choice.