This is a set of 4 black knobs and 2 large plastic nuts specifically for your Ladder Golf grand game. The 1.75" nuts were added in 2021 to replace the small threaded insert in the upright. In the newly designed 2021 game, the knob will go all the way through the base and the upright and connect to the large nut to the knob. This is a much stronger design and it's even easier to put together.
Retrofit: Have an older Ladder Game that you would like to upgrade? No problem. Just purchase the new knob and nut set and then remove the threaded insert from the upright and you are all set.