National Nail Corp 345119 Camo Trim head Screw 1-7/8" 1750 Count is for use with the camo hidden fastener system. Designed for all standard 5/4 deck boards including wood, composite, cap stock or PVC boards for fastener free deck surface. Enough screws to do 500 square feet based on 16 on center. Two free bits included. ACQ approved. Pail.