This spark plug holder works great. I had a little case for the plugs and put it in the back of my sled and they would be all scrambled around, but with this they are right where you need them. Quick easy access to the plugs and holds them securely.
I mounted this plug caddy on my belt cover. It was 6 inches from the muffler, and one end melted/softened enough that the spring and seats popped out with one plug. Very flimsy, (the unit flexes just putting a plug into it if it is not fully mounted to a flat surface) not well suited to high vibration or heat as found under the hood of a sled. I guess you get what you pay for.