SER-D : External threading drophead toolholders.
Right-hand shown
  Designationhbl1fl2GICATGIREMgiic
  SER 2020 K16D 20.0020.0125.0025.038.03820168 0
  SER 2525 M16D 25.0025.0150.0032.038.03820139 0
  SER 2525 M22D 25.0025.0150.0032.038.03820181 0