What is included in the comb. End cap Removable swivel strap. Wrench Material: Detachable button sling end cap are 100% waterproof, fogproof, shockproof, durable solid structure, high quality, lightweight construction with matte black anodized finish. Design: This end cap is designed to fit the Gripe shotguns for Mossberg 500/535/590 / Maverick 88 12 and 20ga with a threaded opening on the back of the grip. This end cap features a detachable button sling that allows for quick attachment of tactical slings without having to undo or unscrew the strap from the webbing. Please note that the photo of the grip with the end cap installed is for illustration purposes only. This listing is for the cap and spanner only. Characteristics: T-6061 aircraft grade aluminum. Black anodized finish. Swivel removable button strap.