SCREW - FINISHING TRIM HD - #9 x 4" HANDY-PAK T15 (GRK #17760) | 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.