RAM mount kit, flat clamp base, short arm 5" (128mm) ball for vehicle dock rear, and keyboard mount for 9000160KEYBRD. The clamp base typically attaches directly to the roof support arm of most fork lift vehicles without the need for additional mounting hardware.RAM mount kit, flat clamp base, short arm 5" (128mm) ball for vehicle dock rear, and keyboard mount for 9000160KEYBRD. The clamp base typically attaches directly to the roof support arm of most fork lift vehicles without the need for additional mounting hardware.