With a hardness of HRA89 or higher, these tungsten carbide button for window breakers are high-performance impact components designed specifically for emergency escape tools. Combining excellent hardness, wear resistance, and impact resistance, they instantly concentrate impact force, effectively shattering automotive tempered glass and other brittle safety glass. Widely used in public transportation escape tools such as buses, subways, and passenger ships, they buy precious time for escape in emergencies.
