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OLFA 25mm Snap-Off Replacement Blades, 40 Blades (280 Segments) HB/CP40: These blades are made from Japanese tool grade steel for unparalleled sharpness and superior edge retention. The long-lasting precision of these blades allows you to work longer uninterrupted. Each blade of this product contains 7 razor-sharp HB Extra Heavy-Duty Silver Snap-Off Segments (280 Segments Total). Great for industrial use, contractors, construction, landscaping, or other heavy-duty jobs. About OLFA: Ever since Yoshio Okada, the founder of OLFA CORPORATION, invented the world's first snap-off blade cutter in 1956, OLFA has been committed to developing practical and safe hand-held cutting tools. 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. OLFA is proud of the unwavering quality that goes into every product it makes.