You’re lying if you say you’ve never dropped your belay device and watched it go “tink, tink, tink” all the way down to the base of a route. It can happen to anyone. But have no fear: If you have four carabiners of any shape or gate type, plus a locking belay biner, you can make it to the ground. The double carabiner brake rappel is the best way to descend without a traditional rappel device.