Pick up some ninja power with blackout screw kits by Captain O-Ring. Replaces all external visible screws on your marker. This kit includes a cap headed socket hex screw to replace the thumbwheel top feedneck screw that is included with your marker. <p> Note: This kit includes standard short and long feedneck screws. The long feedneck screw replaces the thumb wheel screw on certain Eclipse markers that come with a thumb wheel feedneck screw.