These weights are made of durable coated metal that feels good. They are easy to keep clean and get the job done with near 100% accuracy. My biggest weight was light at 0.001g, but that doesn't concern me as I only weighed to the 3rd decimal place for kicks and grins. The suitcase is very convenient, since the smallest weight is almost a piece of foil. I would have lost it immediately if it weren't for the case and a small plastic tray for small parts. The included tweezers have trouble gripping smooth metal. I immediately used something else. Overall, this scale perfectly met my needs and expectations. I would recommend.
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