Sharp and durable. Blade is engraved all around. Equivalent to JIS-B4704. Type: Set of 10 fine points; Total length: 7.3 inches (185 mm); Blade length: 3.3 inches (85 mm); Grit size: 10.8 oz (275 g); Grit size: 01 (coarse), 02 (medium), 03 (fine). Materials: Carbon tool steel (SK-2); Uses: For grinding steel, copper, brass, aluminum, plastic, etc.