It was troublesome to bring something matching the tip size (#) from the tool box when I wanted to turn the screw for a while, so I tried buying it if it would be convenient with this item. Although # 1 and # 2 are comparatively well matched, # 3 has the possibility of licking screws because there are plenty because the bit tip is sharp. I think that it is better to stop # 3 until # 1 and # 2 if used.
Because it is cheap and No. 1 to 3 all correspondence I am using it often for the time being. However, it is pleasure to cry when there is a No. 1 to 2 dual use stepped type because the tip is thick and it can not be used as a counterbored hole.
On 2016-06-08 17:54:06
It is convenient for a bit when you can use the electric dra bit with chopping