Designed to fit universally on any wakeboard tower, an insert pack is included allowing you to set your clamp size for your choice of 1-5/8, 1-7/8, 2, 2-1/4, 2-3/8, or 2-1/2 inch diameter tubing. Once the clamp is secured in place, a rotating mechanism allows you to set your preferred angle for the flag holder. This innovative design allows boaters to keep flags upright while mounting the flag holder on curved wakeboard tower legs.