Features:

Quick release Knee/wakeboard combo rack built with solid 6061 aluminum.

 
Holds 1 x kneeboard and 1 x wakeboard.

2 1/2" clamp comes along with 1 3/4",1 7/8", 2", 2 1/4",2 3/8" rubber for additional tubing sizes.

4 bolts ball clamp stronger than those ball clamp with 2 bolts. 
 

Very easy to install and fit horizontal or vertical or slant tubing at any angles.

UV resist black coated.