Keep employees of your HO railroad and trackside industries safe with the Cornerstone Modern Yard Details Blue Flag kit! Used on the prototype as an alert that workers are present and to prevent movement of equipment, this must-have accessory adds great detail and operating realism! Easily added to new or existing scenes, features include: Must-have detail for modern yards and industries Prototypes protect workers to prevent movement of equipment Adds a new dimension to realistic operations Great value with 50 different photo-etched durable stainless steel signs - Prepainted in blue & factory printed in white for: - Safety First - Service Connections - STOP Inspection in Progress - STOP Tank Car Loading - STOP Car Unloading - Locomotive Under Repair - STOP Men at Work - STOP - Safety First - Derail 32 sign mounts Four Derails molded in yellow plastic - Two styles of Derails - Center track mounted flip-up style - Track mounted angled style