✅ 500-Pack. ✅ Black stainless steel screws (Hardness class #12.9 + Dacromet black coating) are included. Saving time and money. ✅ Made of anti-UV engineering Nylon plastic. No corrosion. ✅ Includes 1 Square Driver Bit: Size 0.09" x 0.09" (2.3mm x 2.3mm); Hex size 1/4". ✅ Clean-look and consistent 1/4" deck board spacing. No more predrilling and countersinking. ✅ Decking grooved edges "C" opening must be 0.15" or bigger. ✅ INSTALLATION: (1) Insert a Myard hidden fastener clip into the grooved edges of decking over a joist. (2) Drive the screw ONLY halfway (Fully tighten later once all boards are in place). The wings must remain level with the joist for the next board to fit correctly. (3) Continue to add clips on each joist against deck boards. (4) Install "next" boards, make sure boards are pressed firmly against the clips and secured under the wings. (5) Do NOT over-tighten the screws. Please set proper driver torquing (2 to 6 drill power). The screw head will be resting on the top of the clip, but not sinking into the clip. ✅ INCLUDINGS: 72 stainless steel starter clips (for 800 SQ. FT. approx.) + 18 black stainless steel screws (Hardness class #12.9, Dacromet black coating) + 1 square dirve bit. ✅ EASY INSTALLATION: Place one at the center edge of every joist 12"-16" apart. Align the back of the deck starter clips on the same edge and fix them with screws, and then you can push the first board into the starter clips gently. ***Decking grooved edges "C" opening must be 0.15" or bigger. ✅ UNIQUE DESIGNS: (1) Bigger spring tail for better locking. (2) Additional side hole for optional screw reinforcement. ✅ FEATURES: Start clips are specially used to install perimeter deck boards to make the installation of grooved composite deck easier. Hidden starter clips provide you a high-quality solution and a clean and fastener-free deck appearance. Weather-resistant, suitable for Indoor and Outdoor use. ✅ COMPATIBLE with Azek, Cali-Bamboo, Deckorators, DuraLife, Envision