When I purchased my new home, I decided to
install a metal security pin to lock the patio doors to each
other.
The pin installation required drilling a
hole into both doors. After I drilled through the first door panel, my bit met
resistance, so I leaned into the drill. The bit suddenly went through, and to
my surprise, the glass in the second patio door exploded into a thousand
pieces. The costly moral: Avoid drilling into the edge of tempered
glass.
