http://www.seclock.co.uk/Seclock/Bicycle_Nuts_1.html
The nuts are £2 and the tool is a tenner, have not tried them as I normally ulock my wheels so don't know how good they are.
@Erudin started
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http://www.seclock.co.uk/Seclock/Bicycle_Nuts_1.html
The nuts are £2 and the tool is a tenner, have not tried them as I normally ulock my wheels so don't know how good they are.