When installed in the exhaust port of a pneumatic tool and/or valve, the Adjustable Flow Mufflers allow an operator to closely regulate the speed of the equipment, while at the same time reducing noise created by air exhaust. Additionally, these mufflers allow for easy, one-handed flow adjustment, and their nickel-plated brass construction notonly easily withstands harsh environments, but also provides equipment with a finished, "dressed" look. Excellent for OEM applications.