GRK Fasteners R4 Screw, Thread Size: #10, 4 in L, Thread Type: W-Cut, Head Type: Countersunk, Flat, Drive Type: Star, Steel, Climatek, Package Quantity: 50 PK, Multi-Purpose, Thread Length: 2.99 in, Drive Size: T25, Yellow, Applicable Materials: Cement Fiber Board, Particle Board, Plastic, Sheet Metal, Wood