Safety Applications: Includes a carabiner and back splice at the trailing end to prevent the rope grab from coming off the end of lifeline; Polysteel rope does not absorb water and will not diminish in strength in wet conditions. Material: These 25ft lifelines are specifically designed from rope made from high strength polysteel; 10 times stronger than polyurethane, polysteel is lightweight with excellent resistance to acids and alkalis. Durable: This lifeline is particularly strong when it comes to resisting damage, making it especially resistant to cuts and abrasions; 5/8" in diameter with a minimum breaking strength of 6,000 lbs. Certified: Peakworks provides a wide variety of lifelines and ropes and our Premium Lifeline Rope meets ANSI Z359 standards, perfect for mountaineering, rock climbing, fire & rescue protection, construction, caving & many other industries and occupations.