18 Copper Round Washer Blanks. 6- 1 1/2 inch, 6- 1 1/4 inch, 6- 1 inch. These metal round disc blanks are made from 24 gauge metal. These soft copper blanks are great for stamping or engraving and are perfect for making jewelry, charms for bracelets, scrap booking embellishments and other metal crafts! Use for monograming, initials or dates. Use with hardened or tempered steel metal design, letter or number stamps. Use this stamping blank as a pendant, charm, tag or other craft embellishment. Polishing and Finishing Required.