The RAM® Tube Adapter with AMPS Hole Pattern (RAP-384BU) features an indent, allowing the adapter to sit flush against a tube to assist in the creation of a mounting location. This solution will not mount to a tube without an additional component to secure to on the other half of the tube. This adapter features a 4-hole AMPS pattern to secure to another components as well as a 2-hole AMPS pattern to allow for flush mounting or secure a RAM® diamond ball bases to create a mounting location secured to a tube.