The Kangaroo Flat Rotary Club have partnered with Victoria Police to help prevent number plate theft.
The groups were providing and installing one-way, anti-theft screws at the Rotary Gateway Park on Sunday.
"We've noticed that a lot of crime has been linked to the theft of registration plates so we're looking to try and disrupt that by putting these anti-theft screws on to the vehicles," Acting Senior Sergeant Dale Hallinan said.
"We find that a lot of stolen plates are used for petrol drive offs, burglaries and theft of cars. So we're looking to try and disrupt those crimes."
The Kangaroo Flat Rotary Club's Kaylyn Journeaux said the group thought it was an important way to help the community.
"We thought as a service to the people, we would supply these screws and the police are here to help us put them on," Ms Journeaux said.
"We were approached by the police and asked if we were interested. We thought it was a great idea."
While a similar service won't happen again until next year, Acting Senior Sergeant Hallinan said there were other ways for drivers to protect their cars.
"To protect the number plates in general, besides from the screws, is to be mindful of where they park their cars in the first place," he said. "If they can park off street, then park off street.
"But all year round, the screws are available at the Kangaroo Flat Rotary Club or they can contact us at the police station.
"The other thing to be mindful of is that if they need to get the screws off again for whatever reason, they contact us for that as well."
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