Since it is made of high speed steel, it can be used safely on hard materials, such as engineered wood, decora, etc. Resistant to heat and impact, it can be used in a variety of situations. Recommended for professional users, as well as for everyday carpenters. Even if you shave laminated wood, the blade will not spill easily. Because of the composite material (high speed steel + super soft iron), it is easy to sharpen and the blade is attached with a artificial whetstone. Even if you grind the edge of the blade with a grinder, it will not harden. (tempering temperature: 132°F (600°C)