I bought a particular brand of trailer wheel lock a few years ago.
A few years later I bought a competing brand of trailer wheel lock for my 2nd trailer (but the lock looked more or less identical to the first one I bought).
I was alarmed to find that the keys for each were 100% interchangeable. Different brands, bought from different stores around 3 years apart.
The brand I bought first is endorsed/recommended by my boat insurer, and I see many boats and caravans in my neighbourhood which all have the same wheel locks that I use. I wonder how many of those all have exactly the same key.....



