KMC Missing Link 6/7/8-Speed 7.3mm Bicycle Chain Links–2 in a pack (Amazon Affiliate)
US: https://amzlink.to/az0Osuqv3P00d
Park Tool Master Link Pliers MLP-1.2 (Amazon Affiliate)
US: https://amzlink.to/az0bmjTbCl2kV
KMC Missing Link Reusable Chain Link (8/7/6 Speed, 7.3mm)