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 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. Milwaukee® 48-22-1512 Self-Retracting Utility Knife, Steel Blade, 6.52 in OAL