The frictional drag that a rope can exert on you, particularly on a long and winding pitch, can be so strong as to actually make upward progress almost impossible. Sure, if you've had the foresight to extend that crucial runner below the roof with a long sling, you're halfway there, but once you're trucking up the final headwall, forearms dangerously pumped, and a few more runners placed here and there as the line of the route twists about, it feels like you're dragging an elephant behind you. DMM's answer to the epic rope drag scenario was to look at the hardware end of the system. They decided to fit a pulley roller into the apex of a biner. A simple, but extremely effective solution to an age old problem. In practice, a Revolver placed at changes of direction on a long pitch can prevent that heavy harness feeling. The Revolver also has a further interesting function it can be used in rescue situations as a pulley. The Revolver carabiners work great for pulley systems and low friction hauling setups. And for added security, there are locking versions available. We're not suggesting that you should climb exclusively on Revolver quickdraws, far from it, but it does make sense to have at least a couple on your rack. Note that this item of climbing safety equipment is non returnable. Please call us toll free at 877 236 8428 or e mail bentgatebentgate.com with any questions.