Stayput 6 5/8" Standard Size Black Shock Cord & Fastener Canvas, 4 Pack w/Black Knobs & #10 Stainless Screws Stayput Black Shock Cord & Fastener, 4 Pack with Black 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!