Why it's on the list
A fridge, a sink, and a night of sleep all complain when the rig is tipped. These are Camco FasTen blocks, model 21025, a 10-pack about 17 by 8.5 by 1 inch, with a handle that locks them together. The yellow 21023 box had no featured offer. Stack them under a tire or a jack. The maker says not to stack higher than 4.5 inches.
How we use it
Chock the wheels before you climb under anything. Level before you pop slides or trust the tanks. The bright color is how you find them at exodus. Shake the dust out of the grooves and count the set before you leave.
Heads up
Blocks level a rig. They do not anchor shade, and they are not a jack stand. Read the stack limit on the listing. A block left under the rig is the expensive kind of moop.
