Festool Sortainer SYS 4 T-Loc. At the full size of a Systainer SYS 4 T-Loc, this new format Sortainer is equipped with three large drawers (with dividers). The new Sortainer SYS 4 is in an all-new, lighter format than the traditional Sortainers. With a new style of drawer latch, removable dividers, and placements for removable (optional) storage boxes. Optional storage boxes, can be purchased in a set, and can be used for even greater onsite efficiency. Compatible with newer T-Loc and Classic Systainers / Sortainer (Classics must be attached to the bottom).