Fix broken grommets, snaps, and rivets on a seat cushion, canvas cover, tarp, boat cover, sail cover, or any heavy fabric with the Redneck Convent Snap Pliers 73-Piece Set (Sockets, Caps, Eyelets, Studs) Button Fastener Installation. This package includes different sizes of the fasteners along with a special tool so both the eyelets and grommets can be set into your canvas. The metal bar on the pliers is for packaging purposes only. Squeeze handles together to remove and replace bar to keep pliers closed during storage. To use this set, place a cap into the holder and slide the hole in your fabric over the post of the cap. Then, position the socket (bowl side out) over the cap post and squeeze pliers firmly to apply cap and socket. Check for tightness and squeeze again if necessary. WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.