It is convenient to work continuously with one piece, but there seems to be difficulty in the durability of the blade of the tap part. While using it several times, you noticed that the screw rotation became stiff and it was necessary to rework with another tap.
We are using it to install new parts. Because the position of the mounting hole is totally different after removal of the existing material, because it is attached with the screw to the underlying material which is difficult to penetrate with the pierce screw. Tap awl is useful because it can be done with drill. Although I was already using it, I purchased an additional purchase by saying that it will surely be broken, as the number of operations is large.
On 2011-09-07 20:38:27
It is convenient to work without replacing the bit, as it is a work on the stepladder.
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