... ZHY CNC ToolsWe are specialized in manufacture and sale cnc tools for 10 years, maily export to Asia, and get high ... toughness.3.It is used to tool holders, to tighten the tool.4.ER A type hand tool: ER11A-BS, ER16A-BS, ER20A-BS ... , ER20M-BS.7.Other cnc tools: carbide end mills, carbide inserts, carbide rod, drill, reamer, tool holder, tool heads, chuck, collet, nut, etc ...