Simply put, a locksmith is a professional security specialist who is skilled at both constructing and breaking locks. Locksmiths handle all types of locks, including electronic locks, padlocks, doorlocks and window locks. They can make and repair locks for homes, businesses and cars. They can install new locks, replace or repair existing locks and cut duplicate keys. They also often provide emergency service and can help you enter your home or car in the event you lose your keys or become locked out.