* This Jewellery Hardened Carbon Steel Disc Cutter Set of 14 pieces with Case. * This very useful tool cut disc sizes from : 3, 4.5, 5, 6, 7, 7.5, 8, 8.5, 10, 11, 12, 13, 14 & 16 millimetres in Gold, Silver, Brass, Copper and other soft metals. * You can cut your own disc, crescent moon shapes as well as, a variety of other shapes. * Make holes within your disc or make smaller circles inside.. * Be sure to have the screw heads up and hit the cutters only on the bevelled end. * The samples on the pictures has been cut on Flat Stock Brass AWS 20 gauge without annealing the metal.. * Set is packed in an protective oily grease for shipping. * You can take the oil off with a little bit of WD-40.