230 / 231 series This mini rotary has an adaptor riveted to the lever arm to be used with .25" dia. rods. The “A" style is mounted above the arm. “B" style is mounted below the arm. Comes with a zinc yellow chromate finish on the housing, and all internal components have an Everlube finish. This single-stage rotary features an integral offset mounting bracket with slotted holes designed for 3/8" dia. striker such as Eberhard No. 240-52U. Single stage is 231 series, dual stage is 230 series.