Durable to use: this circle drawing maker is made of quality aluminum alloy material, odorless and non-toxic, sturdy and durable, not easy to corrode, rust, deform or damage, durable to serve you for long time Package quantity: you will receive 1 piece of aluminum alloy circle template and 1 piece of black flannelette bag for carrying and storage, the diameter of this template is measures approx. 12.5 cm/ 4.92 inches, compact and portable for you to carry andstore easily Expansion design: the perimeter of the adjustable circle drawing tool can be enlarged or reduced, simply rotate the rings to open and close its captivating aperture mechanism, which can be applied to draw round measurements Simple to operate: you just need to put the ring circle making tool on where you need them, adjust the size of the center circle to suit your needs by rotating the golden edges, then draw along the circle with a pen, easy to apply and practical for yourdaily use Warm prompt: screws can be adjusted to an appropriate tightness when first installed, and no subsequent adjustment is required; The product should be stored in a dry place