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Features: 10pcs Tungsten steel Solid Carbide Burrs for DIY enthusiast or hobby and craft fan，and give your rotary tool even more functionality with this set of diamond burrs Tungsten Carbide Burrs Packed well in plastic case box Reaches a Rockwell hardness HRA≥85 Shank diameter: 3mm(about 1/8") Shank Length: 35mm Cutting edge diameter: 6 mm Total length: 42-50 mm (As the pictures shown) a: 48mm/1.89"， b: 49mm/1.93"， c: 49mm/1.93"， d: 50mm/1.97" e: 49mm/1.93"， f: 47mm/1.85"， g: 45mm/ 1.77"， h: 50mm/ 1.97" i: 42mm/1.66"， j: 48mm/1.89"Package Included: 10pcs tungsten carbide burrs