Fall prevention products remove, block, or signal fall hazards. Sometimes called passive fall protection, these products are installed in facilities, buildings, and construction sites where workers are exposed to a vertical drop of six or more feet. Guardrails block off hazards to keep workers from entering an area or approaching an edge with a drop. Self-closing gates can be added to a guardrail system to allow trained workers to enter the area, while ensuring the gate closes when not in use. Roof hatch guardrails block access to open hatches that create fall-through hazards. Skylight guards block access to skylights that can break and cause fall hazards when stepped on. Safety netting is installed on open walls and around the edge of a building to block access to fall hazards and catch debris and fallen workers. Warning lines are brightly colored pennants strung between stanchions to indicate an edge and prevent workers from approaching the edge.