Gridfinity for Festool Sortainer Sort 6, the base plate's width is smaller than standard to fit inside the drawer. The front box goes in the front to fill that space. The boxes have larger clearences than normal gridfinity boxes to be able to fit in between the ribs of the drawer. The height tolerence is VERY tight! Larger boxes does not fit, as the clearence between the boxes is needed to be able to fit in the width of the drawer.