I really appreciate the wide range of sizes in this set. I've used them on a leaking Little Green car before. It was an easy fix using a new piece of tubing and then the correct clamps from this kit (this project was the reason the kit was ordered). The original hose didn't have clamps, so it probably started to leak as it got older. The metal is definitely thicker than others I have for lawnmower fuel lines (too big for a Little Green machine). They have good spring retention or clamping force. If I need something like that, I'd rather just take the range. This is something I like to have on hand. Things do break and it's nice to just walk into the store and find exactly what you need and not guess with the size. With this set, if one size doesn't fit, just try the next one. Definitely recommend it.