Simpson Strong-Tie S10250DB1 Bugle-Head Wood Screw, #10 x 2-1/2", 1 lbUse this screw for fastening all types of wood decking, including cedar, redwood and preservative treated woods. Bugle head provides for flush countersinking. Coarse threads approximately 2 3 in up the shank draw the decking and other material tightly to the substrate. The 6 lobe drive option helps reduce cam out, resulting in easier driving and longer driver bit life. 1 lb Fasten wood decking and some composite decking materials Trim style head is