Twofer

Friction might be what gets you up the wall, but when the friction of constant rope drag gives gravity a fighting chance at pulling you off, you might find yourself wishing you had a DMM Revolver Locking Carabiner. The revolving wheel on top eliminates resistance and makes for easy hauling, keeping your rope and your carabiner from being worn down over time. Incredibly versatile, while remaining lightweight thanks to the I-Beam construction, the Revolver works well for on-the-wall protection, belaying, self-rescue, or even as an extra carabiner to hang your water bottle from. Just don't try to tie your clove hitch onto it.

Features

A carabiner with a miniature pulley built to stop rope drag in it's tracks
Locking style prevents the gate from opening under load
Pulley wheel reduces rope friction, increases the lifespan of your gear, and can be used as a hauling pulley
Keylock nose won't catch on gear, slings, or bolts
I-Beam construction drops weight while retaining a high strength rating