EDGE Clips are for 90? grooved deck installations with wood, composite, capped composite, and PVC deck boards Up to 88% stronger than leading deck board manufacturer?s clips in reducing lateral movement and up to 50% stronger in uplift holding power One-pass fastening?no partial installation is required Fasten with the included NEVER-MISS Guide or with the CAMO DRIVE Stand-Up tool using a drill?do not use an impact driver Creates 3/16? (4.7mm) gap Camo Joist Edgeclip 450 pieces ? Camo deck clips make installing grooved decking easy for everyone. Fasten them by hand with the Never-Miss Guide or while standing up with the Camo Drive. Suitable for up to 50mm joists. Every box comes with a NEVER-MISS Guide to assist with installation.