These consumables are great for my Amigo CUT-50. I bought a smaller kit first to confirm this fact and get a wire support that snaps around a groove in the pink guards. Wire spacing helps keep tips and cutting edge clean. These are consumables, so all of these parts have a lifespan. Their durability depends heavily on the precise application, your manual skills and the handling of your tools. The pink pieces are brittle and break easily if dropped or banged against stationary objects. Clean metal, downward cutting angle, correct power and air settings, braking speed and smooth technique all contribute to longer life. As a human I will probably never do everything right. This results in faster removal of rusty plow parts at odd up angles. And longer service life when cutting new sheet metal for welding carriages. The cleanest cut on new steel means using new tips and less tolerance for dishmarks. In short, it is very convenient to have a lot of them on hand. This kit offers a large number of parts of acceptable quality at a reasonable price. Quantity and price are great. Quality is difficult to measure with all the differences in usage so I can only confirm that they fit my various use cases and are certainly functional and similar to OEM parts.