Shock tubes are safety devices used primarily in the mining and construction industries. They consist of a thin plastic tube filled with a reactive powder that, when ignited, creates a shock wave. This shock wave can trigger explosives or other devices from a safe distance, allowing for controlled detonations. These tubes are often used in conjunction with blasting caps and explosives to ensure precise timing and safety during operations. By using shock tubes, workers can minimize the risk of accidental detonations and improve overall safety in hazardous environments.