The Hillman 3" Star Deck Screw can be used for a variety of applications. It comes with a 6 point star drive system to prevent cam out and knurled section to avoid splitting. This Hillman 3" Star Deck Screw features serrated threads for reduced drive torque and coarse thread for a sturdy hold.Features 4 sharp countersinking blades Sharp point Lifetime guarantee Specifications Thread Type: Coarse/Serrated Type: Screw Application: Tools and Home Improvement Length: 3" Size: 10 x 3" Color: Yellow