Drawing Compass Math Geometry Tools,Drafting Compass Includes Extra Lead Refills,Metal Drafting Compass Precision Spring Bow Drawing,Math Geometry Tools for High Quality Professional Compass/DividerFor math, geometry, art, drafting and drawing, Adjustment Wheel and Locking Mechanism easy to use, prevent the unintentional leg movements. Ideal Drafting CompassUse as a professional carpenters compass for woodworking, carpentry, metalworking or leatherwork. Excellent for use in school, woodworking, or at home. The best circle drawing tool for student, artist, mathematician, carpenter. Adjustment FunctionThe geometry compass has a center wheel adjustment function (consisting of an elastic metal ring on the head, a center shaft and a center wheel). By rolling the center wheel, the diameter of the circle can be finely adjusted, which makes drawing easy and interesting. Pencil compass the best gift for carpenter friends. Color: silver Size: Length: 115mm Delivery Quantity: 1 Piece Warm prompt: 1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering. 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding 3. Only the above package contents, excluding other products.