Excellent cutting chip can be obtained even from a long cutting edge uniformity. Film layer formed on TiN (Titanium Nitride) coated carbide bar surface low coefficient of friction and increases the hardness.Chips with a brush improves prevents adhesion
It is a locksmith. I use it to destroy some things. Spiral is big eyed so it gets caught strongly soon and it is hard to use. I will recommend a mesh "master cut". It is written that it was good that the other person should be spiral, but it was written in reverse. Be careful.
Because the eyes are big, it hangs strongly and the rotation stops. Because it was lacking several blades in one use, life expectancy may be it is regret that it was good if it had to do to spiral cut.