USCutter's SnapCut utility knife with ratchet lock comes with one blade that can be spanned when you need a fresh sharp tip. The non-slip grooves on the knife make for easy handling and help users work more safely and efficiently. USCutter's SnapCut knife is long lasting and durable and features a convenient snap-off blade. Never worry about having to work with a dull blade again! Simply snap off the section you are working with to reveal a brand-new, sharp edge. The convenient ratchet lock makes it very easy to extend or retract the blade. The SnapCut is the perfect tool for cutting paper, cardboard, roofing, drywall, vinyl, acetates, etc.