A hand tool made of tempered steel with tapering ends and of a size that will permit its being pushed through a rivet hole. Used to draw together the component parts of a member or adjacent members. A short, tapered rod for enlarging rivet holes.

a tapered metal pin frequently used to align the bolt holes in the two metal plates, valve castings or other heavy parts

A slightly tapering rod of hard steel, used for niaking rivet holes coincide. Its use is more convenient than advisable.