Ever seen a lock with a round key and thought what wizardry it is? That’s a tubular lock, although some folks call it an Ace, barrel, or circle pin tumbler lock. It’s the go-to gadget for vending ...

CHICAGO — How does a lock work? The standard lock is called a ‘pin tumbler lock’. So, those pins of different length are what prevents the lock from opening without the proper key. When you can slide ...