The perfect accessory kit for attaching featherboard, hold-downs or virtually any type of jig you can think of to your table saw, router table, or any tool with a standard 3/4" x 3/8" miter gauge slot. The fixture kit works by applying outward pressure to the "walls" of the miter gauge slot. The "wedge" bolts push up into center counter sunk holes in the miter bar as they tighten with the star knobs, which pushes the center of the miter bar outward producing a nice tight fit.