Aftermarket Push Button Switch replaces Makita 651947-7 and Bosch 1607200146.Switches are commonly replaced parts in power tools. A switch handles all on/off and variable speed functions. They also have a role in electric breaking; they can momentarily reverse electrical polarity. Because switches use mechanical internals, they tend to degrade and wear out over time, eventually requiring replacement.This Push-Button switch has 4 terminals and a compact design for easy installation. This authentic Makita replacement part is sold individually and replaces Makita part number 651947-7 and Bosch P/N 1607200146.