Quick Blade Change: Razor knife patented mechanism enables effortless blade replacements using standard box cutter blades. Ensures uninterrupted workflow for cutting cardboard and drywall. Lock Back Safety: Lock Back release secures the utility blades during use, providing confidence and safety. The firm lock prevents accidents, making it ideal razor blades utility knife for precision cutting. Lightweight Aluminum Handle: Cardboard box cutter handle offers comfort and control. The lightweight design, perfect for professionals who need a reliable razor blade knife. Compact and Portable: At just 4 ounces and 3.5 inches folded, this cardboard cutter fits easily in your pocket. Our utility knives allow convenient carry on the job, from construction sites to warehouse tasks. Built to Last: Sheffield's Lifetime Warranty backs the durability of this drywall cutting tool. The quality makes our folding box cutter a dependable tool as a package opener or drywall cutter.