EAO offers Series 57 products for passenger access, drivers' desks, and rail vehicle control panels. The Series 57 push-button door-opener combines optical, tactile, and acoustic features and offers a 74-mm (3-in) operating area, optional integrated finding tone, and a tool-less final mounting system. The Series 57 warning light indicator can be used with the push button for passenger door opening or closing awareness. The front-protected light features a large lens with 180° visibility and also mounts with the tool-less system. For drivers' desks and other control panels, EAO offers square and round push buttons, indicators, and selector, keylock, and lever switches for operating specific controls with optional push-in terminals to reduce assembly time and create a secure connection. Series 57 products fit industry-standard mounting holes for easier upgrading.