GRK's FIN/Trim™ Head screws are an excellent choice for most fine carpentry applications and more. They are also ideal for the installation of window extension jambs. Our FIN/Trim™ Head screws have the smallest screw head on the market; With sizes available from 1"1/4(30 mm) to 5"(125 mm), users have plenty of choice. GRK's RT Composite™ Trim™ Head Screws are ideal for most fine carpentry applications, and are recommended for most composite decking projects and climates. The reverse thread feature is available in sizes from 2" to 3"1/8. The RT Composite™ Trim™ Head screw's exceptionally small head, along with the W-Cut™ thread design, prevent most material splitting. Pre-drilling is only necessary if the building material's limitations require a pilot hole to be drilled. (Always consult wood supplier's / manufacturer's recommendations) RT Composite™ Trim™ Head screws come with Climatek™ corrosion protection. This will come in very handy when using our Trim™ screws in composite decking.

FIN/Trim™ head screw #8 takes a T-10 bit.

FIN/Trim™ head screw #9 takes a T-15 bit.