folding retractable fence on casters. chrome barrier on casters. sliding gates on rollers. pedestrian barrier. barricade gate

area automatic barricade barrier block border boundary casters caution chrome close closed closeup construction contemporary control detail elements entrance equipment fence fold folding gate gates guard industrial industry lock mechanical metal modern obstacle outdoor passageway pattern pedestrian perspective prevention protect protection retractable road rollers safe safety security sliding stainless steel stop strong technology traffic wall zone