Ernest Scribbler wrote:
wrote
OK, now I know that I am not supposed to use it like a drill bit, and I
am supposed to use the tap-wrench. In other words, the hardware store
owner gave me the correct instruction. There must be something missing
in the "execution".

I wouldn't worry about it. Sounds like the one thing the hardware guy
neglected to mention is that they don't always work.

Actually, the hardware store owner told me that the tool doesn't always
work, and I may end up drilling the bolts out. The hardware store is
ACE Hardware, and I am getting a feeling that the sales people there
may not know the stuffs but the store owner (or the store manager) is
quite knowledgable.

Jay Chan