STIHL Makes some parts to swap the weed wacker trimmer head with a brush cutter blade. Here’s how to complete the swap. This is part of the STIHL Kombi System. You can purchase the brush cutter blade here: (TRI BLADE DESIGN) https://amzn.to/3an0nxg Here is a link to buy the end retaining nut: https://amzn.to/2v08zVc