The UTG Pro 1.57" (4 slots) Keymond Picatinny Rail Section features optimal profile (0.375" saddle height) for versatile accessory attachmments and modular applications. Precision machined from aircraft grade aluminum with hard coat anodizing. Mil-spec 4-slot picatinny rail sections fully compatible with any Keymod mounting platform with innovative rail edge design providing true continuous rail slots when connecting multiple sections. Includes required Keymod compatible steel locking nuts, steel Allen screws and Allen Wrench. Made in the USA.