Tiger Claw Hidden Deck Fasteners' unique patented design produces a smooth "nail free" surface to emphasize the beauty of the wood. With a free installation block in every box, Tiger Claw Hidden Deck Fasteners install faster and easier. With all work done from the top, you can save on labor costs as compared to most competitors' hidden fastener installations. Constructed from heavy gauge stainless steel, strength and durability are assured. Tiger Claw hidden deck fasteners offer outstanding hold-down power for both wood and synthetic decking materials. They allow the beauty of the wood to be preserved and reduce splitting, splintering, cupping and rotting.