The main purpose of the "Stopping Klepto-card and Identity Misuse Act," also known as the SKIM Act, is to enhance the fight against access device fraud, which includes crimes related to counterfeit credit cards and identity theft. The Act aims to improve coordination among federal, state, and local law enforcement agencies in preventing and prosecuting these types of fraud. Key provisions of the Act include a requirement for the United States Sentencing Commission to update sentencing guidelines for fraud offenses involving access devices.