On Thu, 10 Mar 2005 00:42:47 GMT, "R.H." wrote:

Just posted some more photos tonight:

http://puzzlephotos.blogspot.com/

294 is a type of "wrench" used to remove steam pipe fittings.
i always saw them used to install and remove the union that goes
on the inlet of a steam radiator in home heating systems. The nipple
had two little ribs cast on the ID of the pipe that the tool would
engage in the cutouts. The steps are for different sized nipples,
and the square section is for a wrench to turn it with.
Can't remember what these are called, though...