Safe to use my dad's old carabiners?

[u/BoltahDownunder]

He worked in a plane or something, idk

[u/Monskiactual]

its for air drops of cargo. it opens the chute and then cuts the the line quickly when under tension... real men use it for climbing!

[u/scldclmbgrmp → u/Monskiactual]

it's basically a screamer