... And UM Type ER Spanner1.Three ER Spanner: type A, type M, type UM.2.ER ... spanner using SCM-440 material, with heated jaw, ... holders, to tighten the tool.4.ER A type spanner: ER11A-BS, ER16A-BS, ER20A-BS.5.ER ... UM type spanner: ER25UM-BS, ER32UM-BS, ER40UM-BS, ER50UM-BS ... .6.ER M type spanner: ER8M-BS, ER11M-BS, ER16M-BS, ER20M-BS, ...