Check the listing for details. UPGRADE SCREW for StreamLight TLR-7X. Color: Black, Condition: New. Listed at 9.49 USD. WE HAVE ANOTHER VERSION LISTED THAT INCLUDES A 3/32" HEX WRENCH IF YOU NEED THAT TOOL TO INSTALL THIS SCREW Shown in a 7A but also fits 7X. This upgrade alloy-steel mounting-screw is a lot easier to tighten, loosen and holds a lot more secure and stable than the original factory mounting screw. The second and third photos show this screw and spacer-washer installed, the last photo shows the original factory slotted-screw this kit replaces. It fits models TLR-7X, TLR-7, TLR-7A, 7 SUB, TLR-8, TLR-8A, TLR-9, TLR-10, TLR-RM, TLR-RM II, TLR-VIR II and the USB rechargeable versions of these models which have different models numbers but are otherwise the same light, all have the same factory mounting-screw. The screw and spacer-washer sit below-flush on both sides of the weapon-light so it fits with all holster types. This kit includes a spacer-washer and the mounting screw as shown in the first two photos, the lights are shown for reference only. INSTRUCTIONS : Completely remove the original factory screw, spring and e-clip from the weapon light, you will not need any of those parts with this screw kit. Install the spacer-washer from the upgrade kit into the socket where the spring was located, then install the upgrade screw through the center of the spacer-washer. Snug the screw moderately, enough to hold the light firmly to the rail. Only 6-7 inch-lbs is recommended, too much torque can bend the screw and cause damage to the weapon-light.