Bar Rack Gripper Safety Flag Mount This is for 1 Bar Gripper Bar Rack Safety Flag Mount. ( Silver part only in Picture) Clamps to 3/4" to 7/8" round bar or rack. This flag mount is designed to clamp on the vertical bars of an 3/4" - 7/8" round bar and comes with a 1/2" hole for mounting your desired Safety Flag Mount. Please check out my Amazon Store by clicking on Atv Safety Flags and Mounts above. I have a large selection of Safety Flags and Mounts available.