These are M4 brass threaded inserts for use with the tool that @mmaner mentioned. However, i don’t use the tool. I made my own tool.
This is a video. They used to display the play icon here but i guess they got retarded. click to view it on insta.
These are M4 brass threaded inserts for use with the tool that @mmaner mentioned. However, i don’t use the tool. I made my own tool.
This is a video. They used to display the play icon here but i guess they got retarded. click to view it on insta.