rope access abseiler sitting over high rise building edge having hardware descender device clipping on 10.5 mm dynamic low stretch

105 abseil abseiler access accessory activity aluminum attached background belay belaying building carabiner climb climber climbing clipping connection connector cord descend descender descending device dynamic edge equipment extreme gear hardware harness having height high karabiner knot leadership life line locking loop low metal mountain mountaineer mountaineering object protection rack rappel ready rise rock rope safe safety screwgate security single sitting sport stretch syd technology tool