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Big head Roland (Roland) engraving knife
This technical data:
-cutting 0.25 mm thick material
-diameter: 2 mm (0.08 ") / length: 23 mm (0.91 ")
-optional 30 41 and 60 degrees, 0.25 mm eccentric value
-material: 89-90% Wc / 10-11% drill
-hardness: 91, 5 HRA rockwell
-breaking strength: 4000-4200 / square millimeter