The FastenMaster Cortex Hidden Fastening System is the fastest, easiest way to hide fastener heads on many market-leading composite decking and PVC trim boards.

FastenMaster offers a variety of quality screws for virtually any deck or trim application.

FastenMasters Deck & Trim screw lines include TrapEase, Trio, GuardDog, and TrimTop.

The FastenMaster LOK Line™ is a collection of structural wood-to-wood fasteners used by contractors nationwide to meet code and lower cost.

These GRK screws are thin enough to prevent most material splitting while still providing sufficient strength to guarantee a secure installation.

These GRK decking screws, with their exceptionally small head, along with the W-Cut® thread design, prevent most material splitting.

These GRK screws have an integrated washer head and is complemented with a rubber washer below the screw head.

GRK screws are perfectly suited to meet professional as well as do-it-yourself needs.