US Patent 7260897 Lock miter gauge

A gauge for use by woodworkers in setting the height of a router bit to make lock miter joints with a router table. The gauge includes a base for upright positioning upon a router table. The base has a bottom plate and a top plate connected by a crosspiece. A gauging arm is pivotally connected to the crosspiece at a pivot point and having a front portion extending forwardly from the pivot point and a rear portion extending rearwardly from the pivot point. A gauging finger extends laterally from the front portion of the gauging arm. A setscrew extends upwardly from the rear portion of the gauging arm to a location below the top plate.