The link worked for me.
Well, it is a temporary file down load.
I'll look and see if I can find anything else.
Sorry I couldn't find anything and it was sent to me in an E-Mail, which had been sent to the guy who sent it to me.
Basically: in the past, if you wanted to drill a square hole, it requried a template and an offset chuck head.
This is an actuall drill bit and it is off set, in a three sided design.
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