Gauge
TreeHouser
We ordered some steel DMM Ultra O biners and got them from TS yesterday I think. Man o man these things are slick. I am not saying our petzl ones aren't good but these are far better. The action is super slick, feels like your pulling the bolt back on a tourney rifle. There is absolutely no slack in it either but it is so smooth so it does not matter. Just wanted to let everyone know how slick these are. We are using them on a modified HC setup with the DMM 3 position pulley.