3M Protecta PRO AK020A1 Confined Space Pulley for Tripod, with Self Closing/Locking Carabiner, Fits Up to 1/2-Inch Lifelines, GoldOffers non-abrasive smooth operation and positions lifeline over the confined space entrance for efficient retrieval of victimEasily attaches to tripod eyebolt and provides a means to route mechanical device lifelineCorrosion resistant and durable design will stand up to the elements and extend longevityAllows extremely simple and efficient installation of pulley to anchorage as well as inserting the mechanical devices lifelinePulley with self closing/locking carabiner fits up to 1/2 in (13 mm) lifelinesFor industrial/occupational use only.