501 pieces - Power Pro Exterior Wood Screws 9" x 2-1/2" Star Drive Flat Head Pound. Power Pro premium exterior deck and wood screws feature a no-strip star drive, countersinking blades, no-split twist shank, and no pre-drill, Bore-Fast thread. Power Pro premium exterior deck and wood screws include a limited lifetime guarantee against rust and corrosion. The fastener coating is guaranteed against corrosion in cedar, redwood, and treated lumber for the life of the project. Common project applications include remodeling, fencing, storage assembly, cabinet assembly, and framing.