Disc tumbler locks are a type of locking mechanism that uses a series of rotating discs to secure a door or container. Each disc has a notch that must align with a specific point for the lock to open. When the correct key is inserted, it rotates the discs to the right position, allowing the lock to turn. These locks are known for their durability and resistance to picking, making them a popular choice for high-security applications. They are commonly found in safes, vaults, and high-security doors, providing reliable protection against unauthorized access.