Locked grooves are circular rather than spiral. If audio is recorded on a locked groove, it repeats every time the record turns. This record consists of 100 locked grooves containing samples contributed by various experimental and noise artists, including Amphibious Gestures, Cryptic Weavil, Insect Deli and Mister Fuckhead, among others.

The spiral groove on virtually all records ends in a locked groove close to the label to prevent the needle from riding up on the label.