A deadbolt lockset is a type of locking mechanism commonly used on doors to enhance security. Unlike standard spring bolt locks, deadbolts require a key or thumb turn to operate, making them more resistant to forced entry. They are typically installed in residential and commercial properties to protect against unauthorized access. Deadbolt locksets come in various styles, including single-cylinder and double-cylinder options. A single-cylinder deadbolt uses a key on the outside and a thumb turn on the inside, while a double-cylinder deadbolt requires a key on both sides. This versatility allows users to choose the best option for their security needs.