Bright 900 coating is applied to the surface, so it is difficult to clog and has greatly improved sharpness and durability. Works well with a wide range of efficiency, from aluminum, resin, plastic to stainless steel. This is a large size replacement blade that was not possible with traditional round shanks. The wide type has 1.6 times wider than common replacement blades, and 2.1 times wider than the super wide type. The lineup has 3 types of rough, medium and fine file texture.