The STANLEY FATMAX Retractable Folding Knife features a foldable lockback design, the knife fits easily in the pocket. Its ergonomic design with rubberised thumb pad makes it ideal for heavy duty applications. The retractable blade ensures safety when storing the tool. No additional tools are required to change the blade thanks to instant blade change feature, which takes seconds to change. The knife comes with three blades that can be stored conveniently in the handle.Folding lockback design fits easily in the pocket Ergonomic, rugged design for heavy duty use Retractable blade for safety and convenience Instant blade change, no tools required Internal blade storage for convenience