Physical locks are devices used to secure doors, cabinets, and other entry points. They typically consist of a mechanism that requires a key, combination, or other means to open. Common types include padlocks, deadbolts, and cylinder locks, each designed to provide varying levels of security. These locks work by engaging a bolt or latch that prevents access when locked. When the correct key or combination is used, the mechanism disengages, allowing the lock to open. Physical locks are widely used in homes, businesses, and vehicles to protect property and ensure safety.