These toilet seat screws are made of high-quality iron and premium plastic material for long time usage, which is durable and rust-proof. They are suitable for most standard size toilet seats and are easy to install. The package includes 2 toilet bolt sets. 2 pieces of toilet seat bolts, 2 pieces of metal washers and 2 pieces of plastic nuts. The screws are universal and can be used for top mount toilet seat hinges. The screws are easy to tighten and loosen, and can be adjusted to fit the thickness of the toilet seat. These toilet seat screws are a great replacement for old or damaged screws, and can help to keep your toilet seat securely in place.