SL 570 The SL 570 is a medium electric slide gate operator for commercial or light industrial installations. RoboSwing-R900 Elite Access systems, Inc. presents RoboSwing-R900, the light-duty commercial gate operator, specially designed for limited commercial applications: single family house, residential complexes of 15 units or ranches. Robo Slide Elite Access Systems, Inc. presents the Robo Slide, the intelligent gate operator. Robo Slide is a heavy duty residential sliding gate operator. 222 SS The concept of the fixed-rail hydraulic slide gate operator was pioneered by Hy-Security over twenty years ago, and today our state of-the-art 222 SS is the most reliable, highest quality gate operator on the market. 1601 DoorKing Vehicular Barrier Gate Operator 1602 DoorKing Vehicular Barrier Gate Operator