Everything about our eyelets are superior. The heavy-duty brass, the quality of finish, and the value for your money. Grommet Mart's Self-Piercing Grommets are made from heavy-duty brass. When set with their matching washers, they pierce and set in a single action without the need for a pre-punched hole. Since we carry a large inventory of grommets and washers in stock, even orders calling for popular finishes will be in stock and ready for immediate shipment. *Please note that #2 Self_piercing grommets and #2 Self-Piercing Grommet dies are compatible with any of this micron machines,Tep-1,TEP-3, DEP-2, M-3,Pl-10 and MC-20 machines.