DMM Revolver Screwgate carabiner pulley

The Revolver is fully certified as both a carabiner and as a pulley. The pulley makes wandering ropelines pull smoothly for less leader effort, and the ease of lowering saves wear on your 'spensive thread for top-roping. If you're still wandering the icefields with old-school pulleys, do yourself a big favor and chamber some Revolvers.