Medium Pinch Gauge

This is a larger version of my original pinch gauge. It will gauge the corner to corner measurement of a box from about 11" to 17", helping check that the distance is the same between both diagonals, giving you square corners. The two pieces are joined by a sliding dovetail, and uses a 1" ¼-20 bolt with a washer and wing nut to clamp the halves together.