Another vote for anti-snap. They are also a visual deterrent as they are clearly identified versus regular locks:
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I also fitted some stainless steel 2* security door handles - look good and the external handle will laugh at mole grips. They are quite chunky internally - its very unlikely anything could even get any purchase to snap the locks due to the design.
The old handles were getting tarnished so was a no-brainer to fit at the same time I changed the locks.