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WEST MARINE Canvas Fasteners - Twist Stud with 2 Hole Screw Base | West Marine
Amazon.com: Snaps Kit for Boat Cover, 120pcs Canvas Screws Snaps Buttons Tool Marine Grade Sewing Fastener with 2Pcs Setting Tool
Amazon.com: YMAISS 75pcs Fastener Screw Snaps Black,Marine Grade 3/8"Socket with Stainless Steel 5/8"Screw in Upholstery Snaps for Boat Canvas,Cover. Black Color : Industrial & Scientific