Rope-Grab Fall Arresters. To be used on twisted rope 14-16mm. diameter. Slide freely on the rope and block at the slightest sign of a fall. Automatic locking upon closure. A control lever allows positioning the product on the rope in a manual way, it becomes then a fantastic tool of positioning or restraint. Body in high strength bichromate steel. With screw gate karabiner opening 17 mm. CE EN353-2.