Craig Costello aka KR / KR9 is a Brooklyn artist and graffiti writer utilizing experimentation and invention as primary roles in his process. For decades, he has developed tools for creating art by re-purposing and modifying devices and objects not often associated with fine art, including fire extinguishers, garden sprayers, and shoe polish bottles. Like paint brushes, the tools are an extension of his hand, allowing him to achieve unique marks of varying scale and control. This practice carried over into the street where he was a traditional graffiti writer. He eventually transitioned from writing his name to painting minimal, gestural marks that created his signature drip. One of his favorite surfaces became public mailboxes along the city, in places like San Francisco and New York, which began as everyday objects and transformed into sculptures.