HIGH PRECISION SHAPE COPY: Contour gauge is used to locate profiles or edges and accurately transfer to the material to be cut. Super gauge shape and outline tool is ideal for flooring, carpet cutting, metalworking, wallpapering, auto body, Product shape taking, mold surveying and mapping, ceramic outline extraction, skirting marking, welding and cutting, splicing, engraving, handmade, etc. ANTI-DROP AND DURABLE: The precise contour gauge is made of high-quality metal and ABS, high strength. The roller adopts stainless steel bearing, which is rust-proof and durable. ADJUSTABLE & LOCKING FEATURE: An easier way to duplicate various shapes, It can be locked and fixed after each adjustment to ensure precision accurate.Once object has been contoured, in place for perfect traces every time. PRACTICAL DESIGN: Designed with pulley end and pointer end, both ends can be used. The pencil clip can be moved up and down, which is convenient for exchanging the shape end.The roller end can be used for flat, smooth and wavy shapes, and can also be used as a scribing tool. The end of the pointer can be used for wavy and irregular shapes. EASY TO USE: The pen tip is firmly clamped in the middle, and the operation is simple, that is, push and draw, so that you can draw lines without making mistakes, and perfectly copy any outline!