Originally it is necessary to drill a hole of φ 3.2, but from the cutting edge of the punch to the upper trunk diameter is as short as about 3 mm so that the angle opens with respect to the cutting edge diameter, when φ 3.2 punch is used, the diameter becomes large Pass. Therefore it is good that there is the smallest φ 2 in 7 sets and it is unlikely that the hole opened will be slightly larger even when drilling with this. Hopefully it is good to have a blade length of 3-5 mm with a nearly parallel blade instead of a gradient, relative to the hole diameter of the drill bit.
The sharpness is not good and it was too early to come dull, but suddenly it was enough for just a few times to drill, so it was enough. I think that it is not suitable for regular use, but I think that there is no loss by putting it in a tool box in preparation for Isa.
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