The galvanized quick-release self-locking steel hook design ensures excellent performance in all weather, no matter the wind and rain or the sun, it can be easily handled. Its spring hook tightly connects the back D-ring of the full-body harness, while the O-ring is firmly attached to the anchor connector, creating an impregnable safety barrier for you. That's why 100% heavy-duty polyester with high-quality forged steel O-rings and hooks is corrosion-resistant, high-strength, self-locking spring hook with 3,600 lbs. of door strength and an upgraded braided lanyard with up to 5,500 lbs. of breaking strength provides maximum safety on every adventure. This extension is cleverly designed to not only be easy to carry, but also easily adapt to a variety of harsh environments. It is also highly compatible and works perfectly with your ANSI OSHA fall protection for a wide range of applications such as construction, rock climbing, roofing, surveying, window cleaning and outdoor camping. We insist on quality first, safety first, to ensure that every user can enjoy the most professional and comprehensive protection experience.