An essential item if you plan to make a lot of jewellery, this is a quality craft punch made by Woodware, a leading UK craft company. These punches have a removable bottom lid so that you can see exactly where you are cutting, and the lever punch makes them even easier to use. They cut cleanly with no fuzzy edges. The square cutout measures approximately 0.45 inch - about 12mm per side - so it is ideal for our 12mm square glass. You will love these punches!