Securely fasten a multitude of products onto thin walled structures with easeWell Nuts work by expanding inside a pre-drilled hole, securely anchoring whatever it is you need to mountThese high tech, neoprene mounting nuts effectively seal out dirt and grime at the assembly joint and are great for mounting Scotty products onto kayaksAvailable in 4 & 16 pack options (Fasteners included.)133-4: 4 piecesWARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov