CHESTERFIELD, Va. (WRIC) — They come in different shapes and sizes, and can be found on doors, ATM’s and cell phones.

Skimmers are used to steal information from your credit or ATM cards. Police say a skimmer was used on an ATM in the shopping center off the 12500 block of Jeff Davis Highway in Chesterfield County sometime between April 2nd and fourth.

“I use this ATM quite often, maybe 3 or 4 times a week,” said Chesterfield resident Cedric McAffee.

McAfee says he’s heard of skimmers before, which is why he is always cautious when using any ATM.

“I’m pretty aware of it, so every time i use it i usually put my finger around and see if it pulls off anything,” McAfee added.

So what information can thieves get using a skimmer?

“They have direct access to the cash in your bank account cause they’ll have your card number, your name and address, the code number on the back and they’ll have your pin,” said digital forensics expert Patrick Siewart.

Siewart says it’s important to check your bank account anytime you use an ATM to make sure the correct amount is missing. He also says be aware of the machine you’re using.

“If you’re using the same one all the time then keep your eyes open and realize that there may be something fishy going on if you go in there one day and there’s an additional or device sticking out from that card reader.”

Police say so far they’ve identified three victims from the skimmer. They’re still working on determining how much money was taken.