The MILLER 8174/U 5/8" or 3/4" Rope Grab is designed for use with a 5/8" or 3/4" synthetic polyester or nylon rope lifelines with a minimum tensile strength of 5,000 lbs. When secured to an anchorage independent of the worker's platform this manual rope grab makes climbing and temporary terminations fast and easy. Sold each.
See TnA Safety, Webster, NY on MacRae's Blue Book