... Hand Tool1.Three ER Wrench Hand Tool: type A, type M, type UM.2.Using SCM-440 material ... , with heated jaw, have high hardness and toughness.3.It is used to tool holders, to tighten the tool ... ER40UM-BS, ER50UM-BS.6.ER M type hand tool: ER8M-BS, ER11M-BS, ER16M-BS, ER20M ... mills, carbide inserts, carbide rod, drill, reamer, tool holder, tool heads, chuck, collet, nut, etc.If you ...