So I bought these locks in a lot of 10 old materlocks with out keys online. At first I thought they where some kinda disk retainer locks. The inside of the keyway looks kinda like like it. But I never seen a disk retainer lock with a lightning shaped keyway like that. Additionally I cannot seem to tension it as the front of keyway just spins.
What kinda locks are these and how might I even try to pick one?