A table saw having a table for supporting a workpiece thereon, the table defining a saw blade slot configured to receive a saw blade therethrough and at least one guide slot extending along the table parallel to a saw blade slot and the table saw having a miter gauge assembly comprising: an elongated guide bar configured for sliding engagement within a guide slot defined in a table of the table saw, the guide bar having a side surface defining a plurality of notches therein; a miter gauge pivotably mounted to the elongated guide bar; and a locking mechanism mounted to the underside of the table and configured to lock the guide bar at a selected position within the guide slot, the locking mechanism including; a locking bar mounted to the underside of the table for sliding movement perpendicular to the side surface of the guide bar, the locking bar sized and configured in a locking position for locking engagement within one of the plurality of notches; characterized in further comprising a manual actuation lever accessible at one side of the table, the lever operably coupled to the locking bar so that manual movement of the actuation lever moves the locking bar to an unlocked position out of engagement with the one of the plurality of notches, wherein the manual actuation lever is movable from a first position in which the actuation lever is in the unlocked position to a different second position in which the actuation lever is in the locked position, and wherein the locking mechanism further comprises a spring disposed between the locking bar and the table operable to bias the locking bar to the locked position, and wherein the actuation lever is slidably mounted to the underside of the table for movement in a direction perpendicular to the direction of sliding movement of the locking bar. an elongated guide bar configured for sliding engagement within a guide slot defined in a table of the table saw, the guide bar having a side surface defining a plurality of notches therein; a miter gauge pivotably mounted to the elongated guide bar; and a locking mechanism mounted to the underside of the table and configured to lock the guide bar at a selected position within the guide slot, the locking mechanism including; a locking bar mounted to the underside of the table for sliding movement perpendicular to the side surface of the guide bar, the locking bar sized and configured in a locking position for locking engagement within one of the plurality of notches; characterized in further comprising a manual actuation lever accessible at one side of the table, the lever operably coupled to the locking bar so that manual movement of the actuation lever moves the locking bar to an unlocked position out of engagement with the one of the plurality of notches, wherein the manual actuation lever is movable from a first position in which the actuation lever is in the unlocked position to a different second position in which the actuation lever is in the locked position, and wherein the locking mechanism further comprises a spring disposed between the locking bar and the table operable to bias the locking bar to the locked position, and wherein the actuation lever is slidably mounted to the underside of the table for movement in a direction perpendicular to the direction of sliding movement of the locking bar.