Our 3″ x 4″ L-Plate is a “must have”, providing countless rigging options. We start by cutting 2″ sections of 1/4″ thick 6061 aluminum angle. We then mill in 3/8″ and 1/4″ non-threaded holes. The 3/8″ holes (1″ on center) are provided for your larger rigging needs and the 1/4″ holes for your smaller rigs.