Honestly, never use a Masterlock. Any of them, even the much bigger heavier duty ones. Or any China shit that doesn't spend $0.05 for a few security pins vs straight ones.

Go American Lock (owned by Masterlock and with some of the same designs, but they add security pins so at least idiot raking and stuff does not work well), or Abus or similar.

FYI - widely available and basically fully unpickable by most experts, for under $100 is the Abus Granit line. But $20 or even $10 can get you stuff way tougher to crack than a Masterlock.