Manufacturer Name: Noritake Company Limited Features: Depending on the thickness of 6 blades, it has excellent longevity and sharpness. 1.0 and 1.5 thicknesses are equivalent to Safety Cut One. Reinforced on both sides. Whetstone focuses on life efficiency Can be used for hard work. [Uses] For cutting slats of stainless steel and general steel, small diameter pipe materials, and construction interior materials. Specifications: Grinding material: A grit size (#): 30 Hardness: P Outer diameter: 7.1 inches (180 mm) Blade thickness: 0.1 inches (2.5 mm) Hole diameter: 0.9 inches (22.0 mm) Maximum rotational speed (rpm): 8400 Weight: 5.5 oz (155 g) Tools used: disc grinder