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9% efficiency for particulate filtration
Square end geometry makes it an ideal starting point for modification into custom cutter profiles
Both platens are hardened to Rockwell 60 (60 HRC)
Controls located in the base — stay cool for long service life
Fox Fig. 156C Hart 90 Degree Burs .90mm-3.70mm 134.161HA 9% efficiency for particulate filtrationFox Fig. 156C Hart 90 burs are precision engineered for stone seat cutting, delivering the clean, accurate cuts that professional jewelers demand. Made from premium tungsten vanadium steel and manufactured by Brasseler of Germany, one of the world's leading bur makers, these burs offer consistent sharpness and long lasting durability across the full size range of 0. 90 mm 3. 70 mm. Sold in multiples of 6. Features 90 hart angle designed for precise
