Miller Stainless Steel Manual Rope Grab* The Miller Manual Rope grab can be attached anywhere on a 5 8" or 3 4" synthetic rope vertical lifeline for easy installation and removal. * This rope grab is a manual rope grab that stays locked in position until you squeeze the handle and move it freely up and down the vertical lifeline. * Rope grabs provide continuous fall protection and keep you protected as you move so you can focus at the task at hand and not the gear around you. * The