I am at my wits end trying to to like this thing, its still eating chunks out of my alloy wheels which i am absolutly p**sed o*f about as my vans only 3 months old! The device is shoddy. They say it takes only a minute to fit, yeh if you have no respect for your alloys. It takes me 5 minutes each time taking care not to damage the alloy but each time it does! This in turn will effect the balance of the wheel and tyre! Thanks for the worst £90 i have ever spent!