Posted by Gordon (the other one) on Saturday, March 15, 2003 at 2:45PM :
In Reply to: What is it? posted by Brett in AK on Saturday, March 15, 2003 at 2:06PM :
They use wire to hold together the sand cores that form the internal block contours.
When they blast the sand out sometimes piles of sand and some of the wires and 'sprogs'(metal spikes) get left in there, some embedded in the cast iron.
No big deal.
Gordon