Fiskars 12-6550 Folding Utility Knife. Designed for heavy-duty cutting, this compact utility knife folds in half to easily store in your pocket or desk drawer. The safety lock locks knife in both the open and closed position to prevent accidents. Blade lock allows blade changes with the push of a button, no tools are needed. Crafted with SoftGrip technology, the ergonomic, cushioned handle features a convenient compartment to hold extra blades. Uses standard utility blades.