10 inch and 5 inch contour gauge with lock
Compared with the shape ruler of most flat head single lock or non-lock on the market, This lock is more firm, It can adjust the tightness to make you more convenient and comfortable in use. Especially after being used for several times; It is allowed to use the screwdriver to adjust the screws on both side to loose or tight if you thought the original is too tight or too loose.https://www.amazon.com/BS-ONE-Duplicator-Measuring-Woodworking/dp/B08FX6QT62