The Cortex concealed fastening system eliminates the need to caulk, sand, or paint to hide fastener holes in PVC trim boards. A combined setting tool and drive bit countersinks a special trim screw and creates a cored hole above the screw, allowing placement of a Cortex PVC plug that sits flush with the trim surface. The plugs have a smooth or wood-grain surface. The system comes in 250- and 750-foot packages for use with Azek, Kleer, Koma, and Versatex trim. 800.518.3569.