grozing iron

from The Collaborative International Dictionary of English v.0.48

Grozing iron \Gro"zing i"ron\
   1. A tool with a hardened steel point, formerly used instead
      of a diamond for cutting glass.
      [1913 Webster]

   2. (Plumbing) A tool for smoothing the solder joints of lead
      pipe. --Knight.
      [1913 Webster]