Pegbars are used for "Registration". Which means that they keep the drawings lined up to each other so the drawings can be filmed in the same way they were drawn. This keeps the drawings from "chattering" on the screen or bouncing around. The Acme Pegs have a round peg in the center and two elongated pegs, one on each end. The Round Pegbar has 3 round posts that are 1/4" dia. Even though they look differnent, they both do exactly the same thing. They register the drawings, one to another. Both are in use at many schools and studios. As an example, Disney Adventures in Los Angeles and in Hong Kong are useing the Round Pegbar but Disney Feature is using the Acme Pegbar. So it comes down to your preference. Remember to select your paper to be punched to match the pegbar type that you are using. Acme punched for Acme pegbars and Round punched for Round Pegbars.
