noun
carabiner; snap ring
A metal loop with a spring-loaded gate, used in climbing, rescue, and outdoor gear to quickly connect components.
from German Karabiner
登山用のカラビナを買った。
I bought a carabiner for mountaineering.
カラビナでザックに水筒をぶら下げた。
I hung my water bottle from my backpack with a carabiner.