Tiger Claw TC-G Hidden Deck Fasteners for Grooved Boards (90-Pack) Works in 5/4 inch or greater decking. Please see description before your purchase to view the complete list of compatible decks Heavy gauge stainless steel construction Package of 90 fasteners secures up to 50 square feet of decking when 5 1/2 inch boards are used over 16 inch on center joists Includes stainless steel screws and instructions