High Quality Snap Fasteners Kit: These Marine Grade Stainless Steel Screws Stand Out From the Competition. Both Snap and Screw Stud are 100% Marine Grade Stainless Steel. Perfect for Boat Canvas Snaps Waterproof Seal: Flexible Clear PVC Vinyl Backing Washers Create A Tight Seal and Keep Water Out! You Now Have a Waterproof Seal for Your Marine Snap Fasteners Button Snaps and No Messy Caulk Needed! Strong and Durable: Screw in Snaps Stainless Steel are Corrosion Resistant, Work Well in Salt or Fresh Water. Use with Wood, Metal, Plastic, Fabric, or Leather for a Snug Fit With Your Projects. Multi-Purpose Snap Fastener: Indoor Outdoor, Canvas Snap, Boat Cover Snaps, Boat Cover Snaps, Marine Snaps, Pontoon Boat Cover Snaps, Tarp Snaps, Tents, Awnings, Cushion Snaps, Furniture, Pool Covers. Easy Install: Stainless Steel Canvas Snaps Marine Grade Includes Pack of 10 3/8" Stainless Steel Screw Studs #8 and 10 Flexible Clear PVC Vinyl Backing Washers. Install with Phillips Head Screw Driver