3M DBI-SALA Mobile Rope Grab fits to 58″ Dia rope lifeline. This mobile type rope grab automatically follows worker offering maximum freedom of movement and works on worn rope with no nuisance lock-ups. Energy-absorbing design reduces the forces generated upon a worker in the event of a fall and can be attached or detached anywhere along the lifeline for added flexibility. This rope grab employs both inertia and cam locking system for added safety to prevent the panic-grab situations. It has corrosion-resistant stainless steel, thermoplastic construction and meets or exceeds all industry standards including OSHA, ANSI and the stringent ANSI Z 359.