FastenMaster TrapEase, engineered specifically for composite wood decking and specially designed to eliminate the mushrooming effect caused by standard deck screws. No pre drilling, no staining, or rusting. Corrosion resistant coating in salt air, salt spray, and acid rain environments. Sharp piercing point cuts through the composite material in the first rotation. Deep 2 square drive provides the best bit engagement, reducing cam out. 100% American made. Suitable for treated lumber. Length: 2 3/4".