... in manufacture and sale cnc tools for 10 years, maily export to Asia, and get high credit in customers ... .Using SCM-440 material, with heated jaw, have high hardness and toughness.3.It is used to tool ... ER11M-BS, ER16M-BS, ER20M-BS, ER20M-BS.7.Other cnc tools: carbide end mills, carbide inserts, carbide rod, drill ... will reply you at once, thank you! ZHY High Precision M And UM Type ER Wrench Hand Tool