The Original KuttO™ #20 is a quality safety box cutter that also can be used as a utility knife. This knife has been sold by The Modern Specialties Company for over 80 years.  This is a favorite knife of those who frequently open corrugated boxes. Each KuttO™ #20 includes a moveable safety guard, a single-blade installed and 5 replacement blades conveniently stored in the handle. Please select right-handed or left-handed. Replacement Blades can be ordered here... K-17 Blades