Stoppers are the foundation of any climber’s rack, and Black Diamond’s been making ’em since 1971. Their time-proven design incorporates a unique transverse taper that allows for stable three-point contact in bottlenecks, flares, and shallow seams. Black Diamond Stoppers also happen to have rounded corners that don’t get hung up on crystals or irregularities in cracks, making cleaning a breeze. Lightweight, strong, efficient form of passive pro with 30+ years of Black Diamond ingenuity behind them.