This post will be short.
I had to drill few holes in my gyuto tang. I have marked holes with center punch.
I remembered that previosly, drilling holes was a nighmare for me. Now I decided to use some kind of lubricant. There are special drilling fluids out there, but instead of buying something, I have used camelia oil.
I was really surprised to see that it's working.
And it's working well:D