This ruler can help you circles of different sizes quickly, you don't have to spend time for drawing a circle on the leather, saving time and improving efficiency. It is often used for leather ends used to firm the belt loop on sheaths and holsters. Made of stainless steel, corrosion resistant and strong, can use for a long time. It can be used as a drawing guide, a evering guide or a burning guide without causing any damage to it. A total of 18 different sizes diameters, and there are size mark on the side which is convenient for you to use. The circle in the middle has angle marks, and you can draw arcs. 1.5mm in thickness, appropriate size and light weight, easy to hold. It is thin enough to fit in the toolbox without taking up too much space for storage. This circle tool can be widely applied on faces of different materials and most fabrics, such as leather, wood, glass, plastic, burlap, tile, metal, paper and so on, fit for sewing projects, card making arts and other DIY crafts.