SafeTech Escape Rope 50 ft with Crosby Hook Technora sheath is heat resistant to 932 deg F. Technora provides the highest level of abrasion and cut-resistance compared to other high tenacity fibers. Safe Working Load: 438 lbs NFPA1983,2012 certified Elongation at 10% MBS: 5.80% MBS: 4,383 lbs (19.5 kN)