This chisel?? is 6 1/2 inches long 5/8 inch dia. 8 sided with a 4 sided tapered end that is clearly off center and about 1/4 inch nearly square at the end. It is clearly marked 332-3/8, but the only place it would be 3/8 inch would be part way down the tapered end.
What is it used for? and has it perhaps been user modified?
Pic 1 shows markings, Pics 2 & 3 one side of the taper and the reverse to show the off centered end, Pics 4 & 5 the same for the other two sides.