Its heavy spring loaded on the shackle but on the core too. I need a lot of force to get it open.
Furthermore: When I turn it to unlock position (with key) and then back, I hear some scratching noise when turning back.
I already put WD40 in there, makes no difference.
Question:
Is this hard to pick due to the high amount of spring tension?
I have a few different tension wrenches. Some have a 90° turn to give more area to place the finger on. They are bending quite heavily even to overcome the core spring tension.
Additionally the key has som high/low cuts...
picture:
