Adjustable lock: This contour gauge is able to adjust the tightness according to your taste. After using for a while, you can use the alien wrench to adjust the pin tightness. No more worrying about it whether it's too loose or too tight. Size mark on both sides is available. Different size: Come with two kinds of multifunctional contour profile gauge markings with inch and centimeter graduations. The first is 12 cm (5 inches), suitable for precise woodworking, installing tile floors, linoleum or some tight spaces around a few pipes. The other is perfect for around pipes, round columns, ducts and irregularly shaped walls. ABS Plastic Material: Made of high quality ABS plastic, rustproof and durable. Moreover, it can duplicate something with the original shape. In other words, it can accurately measure the shape you want. Above all, it is harmless to hurt the surface of the object, which makes it possible to measure any object at will. Wide application: it is designed for woodworking, carpet laying , tiles, laminate, molding, checking dimensions, corners or any type of work that requires the duplication of contours, etc. No matter the added curve or shape profiles, it can create an instant model for them. The conclusion of the above mentioned, it is a good helper for DIYers, carpenters, carpenters, architects. Metal locking mechanism: Adopting metal lock, which is more durable than plastic lock. At the same time, the metal lock can be used for a long time. Also, it is useful to keep the shape without going out of the form. Convenient to duplicate and transform the accuracy of data wherever you want.