TUFTEX 847 1 White(100-Pack) Hex-Head Screws DeckDrain DeckDrain #10, 1 inch long, 1/4-inch hex-head screw Tough EPDM washer helps form a water-tight seal Package quantity: 100/box. Pre-drill 9/32-mm holes in TUFTEX panels before installation. Estimate 3 boxes screws per every 10 panels. The number of screws may change based on your