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OLFA Round Tip Safety Knife Blade, 50 Blades (RSKB-2/50B): The rounded tips limit the cutting depth to protect the contents within the package and help reduce unwanted puncture injuries. The dual edges allow you to use both sides of this blade, extending its life. Our dual-sided rounded-tip blades are made from tool grade carbon steel for unparalleled sharpness and superior edge retention. The long lasting precision of these blades allows you to work longer uninterrupted. Each refill pack contains 50 dual edge safety blades that help reduce workplace injuries. The rounded tip replacement blades are available in quantities of 10 Blades (RSKB-2/10B) and 50 Blades (RSKB-2/50B). These replacement blades provide accurate and reliable performance when cutting paper, cardboard, stretch wrap, film, foil, packaging, strapping, corrugate, plastic bags, and more. 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.