ONE ORDER =PACK OF 25 SETS. THE MODERN LOOKING FLAT CAP SURFACE ARE MADE FROM ZINC ALLOY. THE OTHER TREE PARTS ARE MADE FROM BRASS. THESE SNAPS HAVE BEEN TESTED WITH 17MM FASHION DIE SET LISTED ON MY WEBSITE USING KAM TABLE PRESS. I CAN NOT GARANTEE OTHER DIES AND PRESSES WILL WORK.