Assertion: carabiner's shape | /r/HasProperty | key
Facets:
Source sentences:
text: PICTURE best shape for a carabiner brake rappel system (not commonly used, but the symmetric shape is key)
text: best shape for a carabiner brake rappel system (not commonly used, but the symmetric shape is key)
text: second best style for carabiner brake rappels (not commonly used, but the almost symmetric shape is key)