For the screw under the hole is broken nothing this. But this time there is for the metal tried to use it. But it opened the bottom hole of more than 100 locations
Had gone broke, two, this drill if the previous was not expected for the metal, broken thing.
Although it is a consumable was felt that those who serve
M4 has been used under drilling of the tap. Sharpness has been preeminent very handy. Difficulty Choi costs a time even though there is a twist to sharpen the cutting reuse so different from Japanese products.
It will cut less moderate with grilled.
Drill General (Φ1.0 ~ Φ13.0) 0.1 jump +0.01 +0.02
Drill of +0.01 +0.02 (real -0.01 +0.00) plating fee display size is want.
Drilling example in drilling machine Φ3.0 → Φ3.01 Φ3.02
Φ3.4 → Φ3.41 Φ3.42
I was worried because the Korean manufacturers, feeling used was, to the core is cut well without blurring, and love because hesitation not broken.
Depending on the lot, but some ants sharpness of variation is, it businesslike about the error.
Considering the price, it is judged that better than a domestic manufacturer.