I call that my 'Racing Iron' because of what it does to my service meters wheel every time I plug it in! It was my dads when he worked at Vultee during the early part of WW11. That tip is one inch in diameter.

As a young fella I use to solder up boats out of the five gallon lard tins I,d find behind cafes. Worked great and it still makes soldering up to 1/4 inch piano wire a cinch as long as you use acid core solder.

Have always purposely avoided checking what it costs me each time I plug it in though