Review on ZHSMS Valve Core Tool Set: 20Pcs Cores, 10Pcs Caps, 4-Way Tool – Professional Tire Repair & Maintenance Kit by Divine Christmas

I didn't quite understand how to use it but it was pretty easy. It turns out that the valves in most tubed bike tires are removable/replaceable, allowing you to put the valve back in or replace it entirely. Did the trick for me. I think I accidentally loosened the valve so I took it off, added some green goo and replaced it. The apartment has been repaired! Many Thanks