Here’s a carabiner that you can lock with a key!

NEWS – You might not be able to climb cliff faces with this carabiner, but you can use it as part of your EDC gear to attach items to your backpack, belt, etc. The Matador BetaLock is an aircraft-grade aluminum carabiner with a built-in lock that’s TSA-compliant. The spring gate makes it easy to use and the deadbolt-style lock is a good theft deterrent. You can grab a BetaLock in 5 different colors for $30 from huckberry.com.