There are three kinds of keys and locks that you'll commonly come across: round, square, and triangular. Each key will only work on the matching lock - round key to round lock and so on. Keys weigh next to nothing (124 g a piece) and are incredibly useful; unlocking chests and doors is far better than trying to kick or blow them open. Try to 'collect them all' if you can.

Hexagonal and octagonal keys/locks are much rarer, as well as being black in color. These are found on the hidden [[Container|Chest]]s in [[Chest Rooms]] and on doors in buildings such as the Cathedral in [[Attnam]]. If you happen to find one in a dungeon or in a shop, make every effort to get your hands on it. They can also be wished for if you possess a [[Scrolls|Scroll of Wishing]].