Use a quicklink as a wrench
Quicklinks are common rappel hardware, but they can loosen over time. Here’s a way to snug ‘em back up - use another quicklink.
This lets you apply a lot more torque then you can with just your fingers.
Notes:
This method is meant for field improv. Obviously the best tool for this job is a crescent wrench or pliers.
You can use a quick link to tighten (or loosen) another quick link, or potentially to snug down a loose bolt.
It's best practice to install quick links so the sleeve threads down to close, not upwards. That way it's more likely to stay closed.
If you’re installing these as part of anchor hardware, you can use some thread lock to encourage them to stay closed.
Quick links are a rather heavy, single use piece of gear, and many people will choose not to carry them. For some routes it makes make sense to have them, for others perhaps not.
It's best practice to use proper CE rated quick links for climbing rather than random ones from the hardware store. CAMP makes inexpensive, super-strong quick CE rated links in three different sizes, read more about those here.
A 6 mm long quicklink fits (sort of) on the head of a 3/8” / 10 mm bolt, if you need to tighten the actual bolt.
Like many things in climbing, it's a better show than a tell. Here's a short video I made to show how it works.
