It is a drop in style drink holder, all you have to do is cut a hole into the surface you wish to mount the cup holder.
Versatile - can also be used as a drink holder for poker tables, boats, cars, trucks and more ~ please measure your cup holder insert location before ordering to ensure fitment - see images of measurements
Measures Approximately: Top of Cup OUTSIDE Diameter (Lipped Diameter): 3 13/32 or 3.40625 inches / Top of Cup INSIDE Diameter: 2 21/32 or 2.65625 inches / Depth of Cup: 2 7/8 or 2.875 inches / Bottom of Cup Diameter: 2 25/32 or 2.78125 inches /see images for more comparisons and dimensions
Quantity: 4 cup holders ~ Color: Black ~ Made in USA!