GRK RT ProPak Trim Head Composite Deck Screws, 9 by 2-1/2-Inch, 408-Count From the Manufacturer GRK RT Composite TRIM Head Screws have the smallest screw head available and work great for most fine carpentry applications. Most material splitting is prevented because of the TRIM Head screw's exceptionally small head and the W-Cut thread design. The RT screws include a reverse threading under the head of the fastener. GRK has found that the reverse thread helps the screw head disappear beneath the surface of the classic wood composite material, reducing or eliminating the dimple that sometimes appears. Some sizes are available in PHEINOX Stainless Steel. Features #8 trim screws use bit T-10; #9 trim screws use bit T-15 Self-tapping, TRIM head screws; W-Cut thread design One pail contains 408 screws Climatek coated for all weather corrosion protection conforms with ICC#2442 RT series screws for composite decking USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.