Peterson’s positive lock for left-right sizing system is run by chain and sprocket, with a turning handle and lock. So that means it will only move when you unlock it, and you can position the sizing very accurately to within 1mm. No slippage, and top accuracy for every board.
If you have any questions about this, or any other features of Peterson’s range of mills, please leave a comment below. Please note, locking system differs from image on the JP.