SUPERSONIC NOZZLE: This AirSpade Air-Excavation Kit operates at 105 CFM and is equipped with a supersonic nozzle. These proprietary nozzles offer lighting-fast air spray that allows users to quickly dig through materials with ease. DEAD-MAN TRIGGER: When working with a machine this powerful, it's important to keep safety in mind. Fortunately, all AirSpade guns have a "dead-man" trigger, which ensures safety by turning off when the trigger is released. MULTIPLE APPLICATIONS: These air-excavation guns have a plethora of uses, including but not limited to: utility locating and repair, key holing, potholing, and roadwork. No matter what you're digging up, AirSpade is there to help. DURABLE CONSTRUCTION: AirSpade guns has a fiberglass barrel with a built in dirt shield as well as the stainless steel supersonic nozzle. This prevents any cracking, breaking from within the gun as well as being drop proof. AIRSPADE PROMISE: AirSpade boasts over 50 active dealers and distributors spread over North America and a dozen foreign countries thanks to superior performance, user-friendly features, and unequaled customer support.