DescriptionThis is a set of dual system guide rail slot. Items Included, a 3-slot M-LOK/KeyMod rail, a 7-slot M-LOK/KeyMod rail, a 11-slot M-LOK/KeyMod rail, M-LOK T-Nuts and screws, KeyMod nuts and screws and allen wrench. Prefessional kit for your use.Features-Color: Black -Material: Alloy -Size: About 15.5x6.5x1.5cm - Perfect M-LOK / KeyMod rail section includes 3-slot, 7-slot, 11-slot Rails - Hollow Design, Precision manufactured, sturdy and durable - Precision machined out of premium alloy black - Compatible with any standard M-LOK/Keymod system and picatinny rail accessories mounting - Allows you add on any standard 1913 picatinny accessories - 3-slot rail is compatible with sling mount adapter and QD Sling Swivel Adapter (Not included) - Compatible with belt buckle interface. Easy to install