Heavy Duty Utility Blade - Made of aluminum this box cutter is both solid while being lightweight and can handle drops and hits from construction type work Safety Retractable Blade - Simply quick and slide button on the top to either use or retract the razor blade - Blade locks into place for exact cut length Ergonomic Handle for comfortable use for long hours Inside blade storage for additional blades on the go (extra blades sold separately) Lifetime Warranty - We guarantee all Edward Tools for life Edward Tools Utility Knife with Retractable Razor Blade is a solid utility knife or box cutter that can be used for construction, office or home use. With the safety retractable blade design you can slide the blade out for use or retract when not in use. The aluminum frame is both heavy duty and light weight for durability without heavy fatigue for long use. Inside the knife is an easy to access storage for additional blades. Edward Tools Utility Knife with Retractable Razor Blade comes with a lifetime warranty.