Assertion: locking carabiner | /r/ObjectUse | used for less money
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text: However, a second locking carabiner clipped to a higher anchor piece could also be used for less money, and in general we prefer to use an auto-locking ATC such as the Petzl Reverso or ATC Guide to belay up a seconding climber, as they are more secure for this use (and a lot lighter and less clunky to carry up) than a GriGri.