Simpson Strong-Tie S10300DBB Bugle-Head Wood Screw, #10 x 3", 1500 CountUse this screw for fastening all types of wood decking, including cedar, redwood and preservative treated woods. Coarse threads approximately 2 3 up the shank draw the decking and other material tightly to the substrate. Bugle head provides for flush countersinking. 1500 count Type 17 point for fast starts Coarse threads approximately 2 3 up the shank draw the decking and other material tightly to the substrate Pre drilling recommended near board ends