I have this 12" model number 113.29500 Craftsman radial arm saw. On the und=
erside of the arm is a hole. About 1/2" wide by 4-5" long. Everything tells=
me it was from the factory that way. The arm is grey in color even in the =
opening. Can anyone tell me why they would put that there for. I can even s=
end you pictures of it.