All whistles are definitely not created equal. ASP Whistles are molded from ordnance-grade polymer, and feature a Spanish cork ball that generates a piercing tone of incredible intensity. Whether for training or traffic control, there is no more effective means to signal a command. Includes a tooth guard and a high-quality neck lanyard with breakaway closure for safety. The Duty Whistle has a black lanyard, Training Whistle has a red lanyard.