On Wed, 16 May 2012 08:54:55 -0700 in rec.crafts.metalworking, Carla
Fong wrote,
In case you ever wondered why your drill won't go through that angle
iron you salvaged from an old bed frame or street sign:

Once I tried to cut some bed frame with a reciprocating (Sawzall-type)
saw with a "metal cutting" blade. Fortunately, it was my friend's saw.