Goodbye hand sewing! Finishing your edges is now super easy and super fast with this flexible metal teeth fastener which is known as Pli-Grip (Ply Grip) or Flex Trim. It's a flexible continuous coiled fastener that navigates twists, bends and curves. It won't buckle, and it eliminates hand sewing, double welting and gimp tacks. Create professional looking, clean, smooth seams / edges quickly. Pli-Grip / Ply Grip / Flex Trim - Three-tooth pattern; medium gauge - Galvanized satin finish won't rust