Wrench is a Seattle-based company that provides on-site car maintenance and repair services. The company was founded in 2015 by Ed Petersen and Casey Willis. Wrench's services include oil changes, brake pad replacements, and other routine maintenance tasks, as well as more complex repairs such as engine and transmission work. Customers can book appointments online or through the Wrench mobile app, and Wrench mechanics come to the customer's location to perform the work. Wrench currently operates in several cities across the United States, including Seattle, Portland, San Francisco, Los Angeles, and Phoenix.