?Locking Contour Gauge?One order comes 3 pcs: 1 ? 5'' contour gauge duplicator, 1 ? 10'' widen contour gauge and a freegift-carpenter pencil. Contour gauge with lock can keep the shape unchanged, measuring and copying a profile accurately for winding pipes, woodworking, circular frames, etc. ?Double Scale Design?The master outline gauge, layout profile tool has an inch and a centimeter scale on the tool body to provide accurate readings. When you need to measure something, you can also use it. ?Improve Efficiency?The shape?measuring?tool is a good helper for people tiling, duplicating, cutting any objects or even doing home decoration and DIY project. It will save your much time and energy by using it, also make your work more convenient and improve efficiency. ?High Quality?The contour duplication gauge is made of upgrade ABS plastic, which provide more tough, durable and high strength. It is smooth to press the teeth against the object to match the contour without extra-force and then track the shape you need. Tip: 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. ?Wide Application & Best Gifts Ideas? The shape contour gauge duplicator is ideal for installing tiles, laminate, carpet, molding, checking dimensions etc. Best Birthday Gift as a good helper for tinkers, carpenters, woodworkers, architects and even who has home projects, DIY projects and so on, it brings us lots of convenience in our lives.