"Want to access MOSTLY ALL doors in the facility? Then the Level-5 card is the one for you, opening generally all rooms in the facility besides some of the most classified areas, and some spawns are still hidden from your eyes! Happy exploring around the facility upon purchase!"
The Level 5 Keycard is a currently off-sale item that was purchasable for 350 robux.
It was the 2nd highest clearance in the game behind Omni. It could open 3/4 of all doors in the facility. It was taken off-sale in The Heist Update due to it becoming useless compared to the Omni keycard. CLASS-D CANNOT GAIN CLEARANCE!