*Made of imported stainless steel (grade 420) , this metal hard in nature so it increase sharpness and durability. *Created in new design with 45degree angle and sharpness. this shape decrease resistance during slit design. *Sharpness given by AQUA SWISS technique. this is specially developed machine utilising cutting force measurement that give accurate and realistic sharpness and life determination for both quality control. AQUA SWISS is a fully programmable automatic machine. *Available in all size 0.70mm, 0.80mm, 0.85mm, 0.90mm, 1mm, 1.5mm .