The Fein 31345041000 Dust Collector Switch helps provide reliable on/off control for compatible Fein dust collectors. It works by regulating the electrical connection between the power source and the dust collector motor, allowing the unit to start and stop safely while maintaining dependable dust extraction performance. Made to replace a faulty, worn, or damaged switch, it helps rest... https://www.wholetoolbox.com/fein-31345041000-dust-collector-switch/31345041000.html