With the STANLEY®10-099 6 in. Classic 99® Retractable Utility Knife get the flexibility you need to take on any task with the versatile. The pro-grade, carbon alloy steel blade is built for durability and long-term reliability. With 3 positions to choose from, the retractable blade is ideal can tackle all types of professional and home improvement jobs while offering storage space for up to 10 additional blades in its handle.