Tach-It Model-S Slim Line Retractable Snap Off Blade Utility Knife (Pack of 12)
Model - S:  Slim Line Retractable Blade Snap Off Box Cutter.  The Tach-It Model S cutter is a sturdy slim line cutter with a fully retractable 13 point snap off blade so a new blade is available whenever it is needed, no tools are required for blade changes and pocket clip.  Designed for light or medium cutting applications such as; shipping rooms, retail and supermarkets.  Uses Tach-It Style B-6 Blade.