The Revolver reduces rope drag significantly. This is particularly noticable on long pitches and pitches that include changes in angle or direction. The Revolver simplifies the setting up of a pulley/haul systems on both land and water. The Revolver helps dissipate the energy generated in a fall. over a greater proportion of the rope and reduces the force to the top anchor. The Revolver reduces the force felt by a lead climber in a fall. Location groove protects and locates 12 mm dyneema express sling. The first carabiner designed specifically to reduce friction. The Aluminum roller will keep rolling up to 11.5kN so that the forces generated on the anchor in a fall will be reduced. The pulley was built to EN 12278 Standards The roller sits on a self lubricating polymer bearing. The roller and bearing sit on a stainless steel spindle and spindle sleeve. Hot forged 7075 T6 I beam back
Weight: 45 g
Protective ribs for smooth transition from back to roller
Roller made of 7075 T6
High tensile 3 mm diameter 316 stainless steel spindle
Shrouded nose protects wire gate
This biner really does reduce friction on wandering pitches and I've used it far more than I ever expected to. Now that it's available in a locker, it's also a nice addition to a glacier kit as an emergency pulley. That being said, if you're really planning to use a pulley, you'd best stick with a dedicated device.
I have used these for crevasse rescue and they lower the resistance quite a bit when pulling using the Z / C systems. I think I read where they can reduce resistance 25-40 % vs. standard carabiners in that capacity.