Reproduce contours: this precise contour knife is suitable for reproducing irregular shapes in all types of ceramics, molds, carpentry, flooring, carpet cutting and more. Easy to use: By adjusting the strength of the golden button, the pen is inserted and fixed. Use a roulette wheel or the tip of a pen to draw an object, while a pencil can draw the same outline on paper or any object in same time. Design at Both Ends: The knurled end features high quality bearings for smooth and curved shapes, while the tip is suited for more intricate angles and lines. Convenient design: the position of the stylus can be moved to either end, allowing you to change the way you draw at will, and for complex lines there is no limit of speed. HIGH QUALITY AND LONG LIFE: This streamlined blade is made of high quality metal and ABS material, strong and durable. High quality roller bearing shafts are smooth, wear resistant and stainless.