Schlage Locknetics 620 and 631 Series Pushbuttons offer significant installer friendly innovations: screw terminal connections for the momentary action models, easy to install L2/ILL optional PC board offering backlit illumination for the cone with green and red LEDs for monitoring purposes. Additional options include: Delayed Action, Double Pole Double Throw, Heavy Duty Plate, with several architectural finishes and extreme duty pushbuttons. Alternate Action and Narrow Stile configurations are available. The 620 Series Pushbuttons are available in three sizes: 1-1/4" , 1-5/8" Mushroom, in a variety of colors, "Push to Exit" . There are two models of metal 1-1/4" button choice from: aluminum with engraved painted red "PUSH to EXIT" and new red coated aluminum with engraved "PUSHTOEXIT".