Foam inserts and pads for fitting out a Systainer around what you actually put in it. Grid foam is pre-cut into small squares: pull out the ones your tool covers and it sits in its own recess, held on all sides. That matters for anything with an optic or a calibration — a laser or a measuring tool that rattles loose in a case does not stay accurate. Base and cover pads pad the bottom and lid in the M, L and XXL sizes.
Compare products and choose the right one for your work.