Dimension: 3 slots, 5 slots, 7 slots. Material: Made of durable aluminum alloy with a matte black effect. Easy to install: The easy-to-install slides can be quickly installed on any universal Keymod platform, allowing quick modular connection of lights, bipods, sights or other accessories. Application: Fits all standard Keymod railings and picatinny mount systems. Packing: 1 x 3-slot slide, 1 x 5-slot slide, 1 x 7-slot slide, 1 x Allen key, 6 x Keymod screws, lock nuts. Features: Picatinny rails are designed to work with standard Keymod rail systems Picatinny accepts all standard Picatinny accessories. Rails quickly mount to any common Keymod platform, allowing for quick modular attachment of grips, bipods, sights or other accessories. Rails are lightweight aerospace grade aluminum. hollow carved design. Specification: Length: 9.5cm\/7.5cm\/2cm Weight: 82g Color: matte black Packing list: 1*3-slot guide rail 1*5-slot guide rail 1*7-slot guide rail 3* Allen key 6 * Keymod screws and nuts Combo set, aluminum alloy bracket, the back is flat, for keymod Three sizes, the price is a fixed price, welcome to consult 3 slot hollow bead: length 55mm, hole spacing 40mm 5 slot hollow bead: length 75mm, hole spacing 60mm 7 slot hollow bead: length 95mm, hole spacing 80mm Color: Black Quantity shipped: 1 piece