The Story Stick Pro supports a number of new accessories the first of which are caliper arms. Caliper arms allow you to quickly create a physical 'stick' to use as a cut-to reference. The arms are offset to the inside from one direction and the outside from the other. The inside offset is used for the inside measurements and the outside offset for outside measurements. Say you want to put a perfectly fitting shelf between two cabinet sides. Simply adjust the arms out until they contact the sides, lock them in place and use that physical example to set your saw fence that distance from the blade. The same approach can be used for cutting a lid to the exact size of a box. It's not uncommon to use an existing part to cut more of the same size. That's exactly what the Story Stick Pro with Caliper Arms does for you only faster and more accurately.