The Self-Retracting Utility Knife features a self-retracting blade mechanism that 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 onboard storage for up to 5 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.