X-Acto 9RX Pocket Clip Retractable Knife: Ideal for cutting lightweight materials in confined areas. To use, just push in plunger at end of 5" aluminum handle. Blade locks in exposed position, ready for delicate, close cutting. When finished, push down pin in handle to retract blade for safe handling. Includes pocket clip for portability, and 1/16" wide #9 blade XAC209.