Even if you install a tap and turn it with a ratchet handle It is also good to install it on an electric screwdriver Allowing thread cutting earlier than conventional tap handle is convenient. I recommend you to size all sizes of thickness.
I used a 1/4 plug-in tap holder in my workplace. When I was using it, I used it as it should be, but when I used an ordinary tap holder - I felt that the fixed part loosened and it was hard to use. Actually 1/4 was good, but since I do not seem to be currently on sale, I purchased this item. I think that the usability is good. However, when used with a 3/8 handle, the force is overloaded and it seems to break. I converted it to 1/4 and use it.