Double-Cap Rivets & Tools, 120 Sets, GunmetalDritz Double Cap Rivets are used to secure multiple layers of a material together and as a decorative accent on handmade projects and accessories. The Double Cap provides a finished appearance on the front and back side of your project. Used to secure multiple layers of fabric, vinyl, leather, canvas, belting and other materials together Great to use as a no sew options for projects where it is hard to reach into tight areas or hard to stitch through