The new style of Snaplock 2x2 trays use straps vice pin to lift tray from the storage box. this is a problem as the old trays have a notch for the tray above or below it. They are useable if the are used on the underside of the old trays or used by themselves in the same box. A minor inconvenience but none-the-less difficult to merge old and new trays in an existing box.