Product information "Cabinet Door Mounting Jig" Get an extra helping hand for installing cabinet doors with the Kreg Cabinet Door Mounting Jig. Whether you?re working with face frames or frameless cabinets, the jig?s support arm allows you to hold the door with one hand ? while your other hand is free to mount the door hinges to the cabinet. The support arm adjusts to nine different positions for perfectly positioned doors every time. The Cabinet Door Mounting Jig works with left- and right-hand doors.