This contour gauge with a locking mechanism and magnets allows you to easily transfer the shape of an object's profile onto the workpiece. By placing the gauge against the object, the slats conform to its shape, and the copied shape can be transferred to the workpiece. The gauge has magnets on the bottom for better grip on metal objects and a lock for the traced shape, preventing accidental displacement of the slats. An excellent tool for tilers, floor layers, and many other professions.