this works fine and I will probably pick up a couple more

Simple device. Only complaints are too much grease from the manufacturer that needed to be cleaned up (and I do not know what kind of grease it is- which matters in case of reaction with the other substances you are working with). The jack is very precise with a tight machine screw thread count. This does mean it takes A LOT of turning to fully raise the jack- but the precision it offers is worth it. This is a rather small jack, so if you are running larger experiments, you might need to step up to a larger size. But for my backyard organic chemistry hobby, this works fine and I will probably pick up a couple more.

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