The Tiger Claw TC-G clip system is the fastest, easiest way to hide fasteners on grooved decking. It has been specifically designed to work in 5/4 in decking boards. TC-G works in pre-grooved decking planks or non-grooved decking planks using our TC-150 slot cutter. The TC-G is made of 304 grade stainless steel and is approved for use in saltwater applications and ACQ or chemically treated lumber for long-term performance. The clip's sharp prongs embed into the upper portion of the groove for strong holding power. The stainless steel screw ensures a lasting connection between decking board and joist.