They work exactly as you expect them to. They keep fans quiet and eliminate the need to tap fan mounting tabs or the computer case. They are pretty soft and pretty easy to install. Remember to insert the thick part into the fan tube and the thin part into the side of the computer case. If the bolt won't go through the fan mount or through the case, gently pull it in a circular motion to trick the thick end, and if that doesn't work, use some window cleaner to lubricate the bolt. hairpin
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