1. Cut off the old spear head or the protective spear head on the new pole with a paper cutter to expose the copper hoop and wooden parts.
2. Put the copper hoop and the end face of the wooden part on the same plane with a paper cutter.
3. Use sandpaper to polish the wooden end face and the gun head plane.
4. Scrape a proper amount of glue with a blade and evenly spread it on the wooden end surface and the bottom surface of the gun head.
5. Fix the leather head on the billiard cue with the club trimmer. If you don't have a club trimmer, you can gently hit the club head with a hard tool, or stand up the club vertically and tap the ground with the gun head.
6. Use a small file to polish the gun head into a smooth arc. In this way, the new black 8 gun head is installed.