It’s possible to copy a tool by clicking on it and selecting Copy Tool from the Actions menu:
Once copied, left click on where you would like tool copied to, either to the same chart or another chart in the same workbook.
To copy multiple tools hold the CTRL key down and click on them and they will turn orange. Once they have all been selected, right-click on one and click on Copy Selected Tools from the Actions menu, and then click on where you would like the tools to be copied.
Note: to add grouped tools as a single Toolbar button see here.