Only used for an hour so can't really tell anything about durability, but it looks and feel sturdy.
Such a perfect tool to dampen the sound when you need it. No screws or anything, just slip it on.
I strongly recommend this to all new banjo players (like myself). A banjo can be so loud, but still you need to learn to play it right. You have to learn to pick it with the same "attack/strength" as you would in real.
Trying to play a banjo silent will harm the way you're picking and probably the way you hold the instrument and hand as you're trying to play silent. This tool really helps with that!
But don't expect it to be super-silent, maybe 50% reduction or so.
Love it!