Stayput 6 5/8" Standard Size White Shock Cord & Fastener for Canvas,4 Pack w/White Knobs & #10 Stainless Screws Stayput White Shock Cord & Fastener, 4 Pack with White Attachment Knobs Four #10 Stainless Steel 1" Installation Screws Included Do away with Snaps! Quick & Easy to Use! No more tired fingers from Snapping on Covers! Just Pull the Shock Cord onto the Knob!