There's usually only one crux that you fall on over and over until that glorious redpoint; Edelrid recommends you clip the bolt you're rallying on with the Bulletproof Quickdraw. Each carabiner features a steel insert where the rope rubs in order reduce wear, burrs, and sharp edges to stay solid for seasons of punting and lowering. The rest of each carabiner is all aluminum to stay light on your harness.