Our self-retracting utility knife features a self-retracting blade mechanism retracts the blade when the button is released. The MILWAUKEE® retractable blade utility knife offers tool-free blade changes for quick and efficient changes and on-board storage for up to five blades. The two blade positions allow you to choose the cutting depth of the blade to minimize damage from over cutting. The lightweight utility knife has a slim, all metal body that takes up less space while standing up to the toughest job sites.