20 pieces of brass blank challenge coins, 40mm engraving blanks with threaded edge. Coins for DIY crafts, engraving, traveling, accessories. Material for fiber laser engraving machine (3mm Brass).

"Package includes 20 pieces of brass blank challenge coins (40mm engraving blank coins with threaded edge)." "Commarker 20 pieces of brass blank challenge coins, 40mm engraving blanks with threaded edge, coins, DIY crafts, engraving, travel, commemorative collection, accessories, material for fiber laser engraving machine."