I have gone through several boxes of these over the years. Not only are they great for stirring the last 2″ of paint and epoxy, but they are also so precisely cut that I used them on a measuring table for shims when we measured parts for prototyping using a high accuracy measuring tool.
You can build them up in almost perfect 1/16″ layers and since they are made of hard wood they are surprisingly stable with moisture and temperature changes. I have repaired door jambs, precisely spaced decking, leveled flooring by taping bundles together, and tweaked jigs of all kinds for household projects. They are a must have for the creative handyman. Cheap and useful for a never ending array of things.