Counter display unit of new patented folding knife. World's first self retracting utility blade knife. Quick blade change. Knife locks in open and closed position. Thumb stud for one handed opening Convenient counter display unit for American Line's Pro folding utility knife. The knife is the first utility knife with a self retracting blade. The knife is manufactured from durable metal alloy for professional use with a new age cut away handle design. Additional design features include a thumb stud for one handed opening, quick blades change mechanism and clip for convenient storage.