OLFA SILVER HEAVY-DUTY BLADE 25MM [PK-5] OLF/HB5B
OLFA ENDURANCE blades are made from high carbon tool steel (SK-2) and sharper than most other snap-off blades in the world. During the manufacturing process, the following factors are perfected to ensure a good balance between sharpness and long life:
Hardness, Sharpening Angles, Tapered Dimensions, Coarseness of whetstone & Speed of grinding.