Drift -

: Forge a long taper at one end to enter the hole and a shorter taper at the other for striking.

: Perform a "midbar upset" to thicken the section where the hole will be. : Forge a long taper at one end

In metalworking, a "drift" is a tool used to enlarge or shape a punched hole to a specific dimension. : Forge a long taper at one end