You'll typically need a screwdriver (flathead or Phillips, and potentially an Allen wrench/hex key like the Eklind set for handle screws), an adjustable wrench or pliers, and a small utility knife for prying decorative caps. A basin or rag is also helpful for catching drips.

This is generally considered a beginner-level DIY project. For most standard faucets, it can take anywhere from 30 minutes to an hour. The most challenging part is often identifying and carefully removing the old cartridge without damaging the faucet body.

Always turn off both the hot and cold water supply valves located under the sink to prevent flooding. It's also wise to open the faucet briefly after turning off the water to drain any residual water and relieve pressure in the lines.

For a stuck handle, carefully check for a hidden set screw under a decorative cap or on the side. If the cartridge is stuck, try gently wiggling it with pliers or applying a penetrating lubricant, being cautious not to apply excessive force which could break faucet components.