Its simple ! You can use the measure instrument named the khanmeter. The weakness / 'glassness' of a fragile chin can be measured with this instrument. The scale numbers of this instrument are from 1 to 10 k (khans). When a chin measures 9 or 10 khans, that means the chin is made from very thin glass ( very rare case , only one fighter has that type of chin and I'm pretty sure that u all know his name :yep:hey) ps i hope this information is useful to note since now the fragility of a chin.
