Olfa "LBB-10B" 18 mm Replacement Black Blades - 10 Pack

These Olfa 18 mm (3/4") Replacement Black Blades are sharper than standard silver blades by up to 25%. These heavy duty blades are made with premium carbon tool steel from Japan & are honed on both sides of the blade for professional grade cutting. Great for tough projects when you need your utility knife blade to hold its own. Each blade is constructed with eight (8) segments per blade for plenty of accurate cutting action. Segments are etched with deep grooves for easy, clean breaks. When a segment is dull, a simple snap supplies a fresh, sharp edge. Sold as 10 PK of blades. Fits most Olfa 18 mm heavy duty snap-off utility knives.    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.