The masses I received seemed to be solid metal, unlike some of the other reviews have said.
The weigh boat has a relatively small flat portion on the bottom and the handle is also quite small, this makes it hard to handle and easy to spill especially if you are using it to handle liquid.

I personally replaced it with a higher walled teflon weigh boat with a fully flat bottom. The tweezers are tweezers, not much to say there - they are stainless steel with a sharp tip allowing small amounts of sample to be scooped but since they are stainless powder sticks to them pretty significantly, so for my uses I replaced them with a teflon tipped pair of the same size.