Trango Tough Dogbones 12 cm. They are easy to grab and the rubber keeper ensures your rope biner is in the right orientation every time. Plus they're durable enough for the abuse of sport climbing and projecting. Available in 12cm and 17cm lengths. Package Contents: Trango Tough Dogbone - 12cm Trango 26320-12: Tough Dogbones 12 cm Trango 26320-17: Tough Dogbones 17cm Trango 26320-12: Tough Dogbones 12 cm