A deadbolt lock is a type of locking mechanism commonly used on doors to enhance security. Unlike standard spring bolt locks, which can be easily opened with a credit card or similar tool, deadbolts require a key or a thumb turn to operate. This makes them more resistant to forced entry, providing an added layer of protection for homes and businesses. Deadbolt locks 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.