Olfa "XH-1" Utility Knife - 25 mm Blade

This Extra Heavy Duty Olfa 25 mm (1") blade utility knife has everything you need to cut through your day. The reinforced fiberglass body is rugged but lightweight in hand. A non-slip rubber grip extends around the body for extra comfort. The XH-1 arrives ready for action loaded with a consistently Ultra-Sharp Black Snap Blade that is 25% sharper than standard Olfa silver blades. The thicker blade is maintained by a stainless-steel channel providing extra leverage for farm work, construction projects, and more. The ratchet-action dial allows for easy blade extension to unlimited cutting depths. A simple tool-free blade exchange means no time wasted when you need a new blade. The versatility and toughness make it the perfect go-to for every job.   Made in Japan.

From the Manufacturer - About OLFA:

    OLFA brand blades are made with top quality materials, forged with technologies that stem from traditional sword-making, sharpened with technologies that give a blade life, and ultimately finished with the craftsmanship that brings all of this together. The holders and handles that allow users to gain the full cutting performance of these high quality blades are designed, developed and manufactured in Japan and subjected to stringent quality checks throughout the process.