All it is, is a 2X10 with 6 holes drilled in on a angle to except 6 plastic rod holders. Get at walmart or were ever, about $5 eacxh and you can add as many as you want.
Thats it!! Bedliners have a slot for you to add 2x4 across the bed, just slide in there and you done.
For long rods you can, and I will be making another piece that comes out the stake holes and goes across the back with some clips to hold the rods from bouncing around.
As we all know it is great for transport, but not security!! Thats how CB lost his stuff last year!! *But I am sure with a little work it could be more secure!