On Nov 3, 1:48 pm, wrote:
I have a metal pin look like this

| \
=====\
| /

It is attached to glass panel

| glass
|====\ glass
| glass

I need to take the pin out. The flat part of the pin has
dimension of 5/16 inch. The pin attached to a glass panel. I bought a
1/8" titanium bit and drilled the pin hopefully to break it apart.
The drill bit just made a scratch on the pin but does not penetrate.

How should I take it out without breaking the glass panel ?

Thanks,
Nick

I'd try nitric acid