Simple installation process takes only seconds. Slides effortlessly on the rail and secures with a thumb screw. Seat must be positioned at the farthest rearward setting. Featuring a large 3 1/4-inch hole, accommodating large mugs, pop cans with koozies, stainless steel tumblers, or water bottles. Drinkware not included. Alternatively, you may consider purchasing a new stainless steel 30oz tumbler from our other listing. The holder sits approximately 3-4 inches above the floor and can be mounted on either the right or left side by simply flipping it over and relocating the thumb screw. Precision laser-cut and finished with textured black powder coating. When mounted on the passenger left side, it is conveniently accessible without any obstruction for the driver or passenger. An excellent gift option for 911 owners.