CONCEALoc is a hidden fastener system that combines easy installation with the aesthetic look of a fastener-free surface. The CONCEALoc hidden fastener system was made to be used exclusively with Azek and TimberTech decking. Fasten your grooved or solid (after a groove has been routed in) Azek or TimberTech deckboards with this quality product for a pleasing, lasting finish! This system makes installation easy by eliminating the need for self-spacing each deckboard. The CONCEALoc fasteners provide consistent spacing between the sides of each deckboard. Use the CONCEALoc hidden fastener system to finish your head turning dream deck!