The manufacturer says its folding lock back utility knife is an easier-to-use version of the popular tool. A Quick Change Button feature allows users to make blade changes 50 percent faster. In addition, the knife only allows blades to be changed when it is at a 45-degree angle, making it less likely for the blade to slip out of the knife. The knife also has a wire-stripping notch. 800-464-7946. www.irwin.com.