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Pack of 4 (Total 400 Count). High-grade long lasting high carbon steel edge. Each blade protected in shelling paper. Fits all window scrappers and box cutters. Great for paint prep glass scraping and box cutting. Long lasting world famous duro edge. Easy-to-Use - Each pack comes with 100 blades packed inside a clamshell package for safe and convenient blade storage. Great for paint prep glass scraping and box cutting. Trusted Durability - Each straight razor blade is manufactured from heavy-duty high carbon steel for extra durability and long life. One Blade Replacement.- Every American Line single edge razor blade fits a standard razor blade scraper and box cutters. These industry-quality blades are ready for anything. The Cut You Can Count On - Ideal for scraping, trimming, and cutting projects such as removing paint and decals from windows, cleaning a glass stovetop, or industrial uses such as removing material buildup on machinery.