Fastcap's TriBlade Utility Knife is a must for anyone who ever needs to use a knife. Its unique design allows for additional storage of 2 extra blades. Now you will never be without a sharp knife. The rubberized grip makes it comfortable to hold and the retractable self-locking blade makes the TriBlade safe to use. Features of the TriBlade Utility Knife: Retractable snap-off blade Auto-locking mechanism on the blade for strength and security Two extra blades tucked away in storage area in handle Built-in notches for snappling off old, dull blade tips Refill blades available in 10-packs