When setting up or regulating set of dampers, making sure that the bends are parallel is crucial to the aesthetic of the way that the damper travels. In Piano work efficiency is Paramount. That’s why manufacturers use devices like this to ensure that these bends are made properly as opposed to relying just on a set of pliers as we tend to do out in the world. This device allows you to measure how large of a bend you need to make, and to create that bend in the damper wire parallel every time.