Many newer two-handle faucets use individual cartridges or diaphragm stems. Both types are long-lasting and easy to repair.
An individual cartridge is similar to a single-handle cartridge. It contains a plastic or rubber valve that opens and closes to permit or stop the flow of water.
Fixing a leaky faucet may require replacing the cartridge or replacing O-rings and seals, depending on the manufacturer and model.
Less than an hour for most repairs
Screwdrivers, groove-joint pliers, perhaps a socket wrench, and a handle puller
Shutting off water, dismantling a faucet, installing small parts
Shut off the water, close the sink stopper, and place a rag in the sink to catch any parts
Materials Replacement cartridge or O-rings and seals, silicone grease