PETZL - String, Sling Protector for Climbing Carabiners SAFETY AND STABILITY: The STRING holds the rope end of the carabiner in place on a quickdraw. PROTECTS GEAR: It also protects a large area of the sling against wear and tear, making your gear last longer. DURABLE AND FLEXIBLE: The rubber construction is durable enough to hold up to a hard climb yet flexible enough to easily manipulate. A MUST HAVE: The STRING is an extremely useful accessory that keeps your gear in place and lengthens its lifespan. SIZE OPTIONS: Choose between three size options: Small for webbing 10 mm wide, Large for webbing 15-20 mm wide, and X-Large for webbing 25 - 30 mm wide.