Overall this is a good, accurate level for heavy use. I used mine for tiling because I thought it would easily handle clutter due to thin typing and other abuse. It works well but isn't waterproof like I expected. I just tossed it in a bucket of water when not in use so it wouldn't get hard. I ended up bullying the vial caps to the point where I could no longer see the vials. So I threw that one away and bought another one. Now I have to think about water and purification. But it's still the best level I've found for mortar, concrete, etc.
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