Unique, Semi-Flat design, no more hassle in rolling over a table!Once you pick up this tool, you'll feel the quality immediately. Unlike other precision craft knives, this unique design is retractable with perfect cutting angles at each stop including 45 and 60 degrees. Requires item #89455 replacement blades.Only 5mm thick, suitable for precise work. Ambidextrous design for left and right hand user.