This CRL Olfa Super Heavy-Duty Retractable Blade Knife was designed for the toughest of jobs with a .028" (.7 mm) thick blade that will extend a full 4" (102 mm). A rubber grip handle on the back side provides a non-slip surface for safety and comfort. The H1K uses the heavy-duty 1" (25 mm) wide HB5B Blade.
Large 25.4 mm Wide Blade