They are fantastic, you set them to size the first time you use them and thatís it, the yellow is rubber to protect the hull from the stainless mechanism, and mine have white reflectors on the Velcro that holds the excess webbing. I bought two for the transom ($49.99 Twin pack) and one of these;
for the bow ($19.99). Yes they were expensive, but as I love my ribbing I figured I would get my moneys worth over many years with no damage.
The Yanks stores are just good at offering stuff that works.