Easy Wood Tools has spent over 60 years perfecting the craft of carbide cutting. They understand that the perfect cutter comes down to three key factors: Grade, Grind, and Geometry. That's why they invest tirelessly in developing the ideal combination of these variables. Unequaled Sharpness: Easy Wood Tools Ci4 Diamond Detailer Replacement Carbide Cutter features a meticulously chosen carbide grade that holds a long lasting, sharp edge delivering exceptional results from the first cut to the last. Precision Finish for Long-lasting Performance: Their precision grinding technique ensures a clean and chip-resistant finish for continued cutting excellence. Crafted for Easy Finisher Compatibility: The Easy Wood Tools Ci4 Diamond Detailer Replacement Carbide Cutter is designed specifically for the is made especially for all Easy Wood Tool Easy Detailers sizes EXCEPT: Micro Easy Detailer and Mid-Size Micro Easy Detailer (these two use Ci7). It's a perfect replacement or upgrade, ensuring your tool delivers its peak performance.