Grip-Rite's #9 x 2-1/2 in. Star T-25 Dual Flat Head Auger-Thread Sharp-Point Yellow-Zinc Construction Screws combine efficiency and strength in a high-volume pack designed for contractors and DIY professionals. The Star T-25 drive reduces cam-out and increases torque transfer for faster installation, while the auger-thread design enhances holding power in softwood and treated lumber. These screws provide consistent performance, secure fastening, and clean finishes, making them a dependable choice for construction, remodeling, and woodworking projects where precision and reliability matter.