I use one of these: http://www.grandwallequipment.ca/products/hauling_gear/u_ascend.html
Old one I have was made by Brasovia. No teeth, slides really really well, hasn't failed yet...
Really popular in Squamish.
I don't use a back up device with it, but I will tie a knot in the rope (a few meters off the ground) if I know I will be falling a lot or if the route will have me climbing on weird angles (overhangs etc).
Cheers,
Mike |