The KROM WEIGHT MATCH GUARANTEE, or WMG for short, is our guarantee that a given kendama will come with a tama between 0 and 7 grams heavier than the ken. This is chosen as a majority of players prefer either a completely “dead on” (ken and tama weighing exactly the same) setup or a slightly tama heavy (the tama being a couple of grams heavier than the ken) setup.