GRIGRI Use

This PDF document from Petzl, details all the authorized ways to use the GRIGRI. Including as a mult-pitch belay device for bringing up a second. I have used it for that when I’ve clipped the GRIGRI directly into the anchor – and that is a technique “authorized” by Petzl – but Petzl prefers you use it clipped into your harness with a re-direct ‘biner at the anchors. (Page 11-12 at the link.)