RAM® Mount Kit - Round Base, Medium Arm - Thor VM1, VM1A, VM2, VM3 - includes Round Base with D Size 2.25" rubber ball for mounting to the vehicle, 8.5" Medium Double Socket Arm and Round Base with D Size 2.25" rubber ball for mounting to the rear of the vehicle dock - This mount typically requires drilling holes in the vehicle - Hardware (screws and washers) for mounting the base to the dock is included - Hardware (three or four ¼" bolts or fasteners) for mounting the base to the vehicle is not included