Developed as a safe alternative to replacement blades used with standard utility knives, and to minimize the costs associated with medical, legal and lost time from employee and consumer injuries caused by loose blades in the workplace. Uses a spring activated blade guard to protect users by closing after each cut. Kit includes four assembled knives and eight replacement blade cartridges. Knife Type: Utility; Blade Type: Fixed; Blade Material: Stainless Steel; Number of Blades: 12.