Durable and No-tangle：50Feet Multi-strand, aviation grade dual alloy steel wire, make sure Fall Arrester’s no-tangle, high strength and long-lasting performance Multi-protected：Double shell with alloy steel gear and outer polypropylene housing, make the protector is Insulated, Wear-resistant and Drop-resistant. Also Crash-proof leather washer and Anti-fire rope with Hard-wearing cover provide the Fall Arrest Protector’s High Safety Performance even in outdoor extreme environment Self-retractable Double-locking：The steel snap hook with spring for Self-locking automatically, durable and No-deformation to ensure high safety performance with breaking resistance >2,000LBS Quick Brake Fall Protection：The Dual-disk Brake provide reliable and agile Fall-arrest performance with locking speed at 3.3feet/s and locking distance less than 0.65feet Compliant with ANSI：Compliant with ANSI/ASSP Z359.14-2021 standard, Working load capacity is around 130LBS-310LBS