A single handle faucet cartridge repair kit comprising a bonnet nut, an upper assembly comprising an outside body, a roll pin, a stem, and a stem cam, an engagement disc, a upper disc not comprising holes or throughbores, a lower disc comprising holes or throughbores, a bottom seal retainer, and a bottom seal. The single handle faucet cartridge repair kit can further comprise a wrench, lubricant, and a handle screw, wherein the handle screw comprises threading.