20m Horizontal Safety Line - For up to 2 users20m Horizontal Safety Line Adjustable twin user self tightening 20 metre temporary horizontal abrasion resistant safety line with two 80cm connecting slings, two twistlock karabiners and integral carrying bag. Temporary horizontal lifelines offer an anchorage line located close to the edge of the drop zone, safeguarding the user from the potential for pendulum motion in the event of a fall, while reducing the fall distance.