FIN/Trim screws are an excellent choice for deck rails, exterior/interior trim, joining cabinets and most fine carpentry applications such as crown molding and window/door jambs. It leaves a clean look as the tiny heads disappear when countersunk. Available in #8 and #9 ga Dia in lengths from 1-1/4 to 5 in. Approved for use in all applications that include pressure treated lumber.Star drive eliminates stripping for improved productivityTrim head for a clean finished lookW-Cut low torque, faster driveZip-Tip allows for one step installation with no pre-drillingCase hardened steel for high tensile, torque and shear strengthClimatek coated screws provide corrosion resistance in pressure treated wood with corrosive ground contact