Hello Marius, 
 
You may be right when it comes to a sword, but what if the blow comes from a mace? 
I have so far seen several katars with 'thin' side guards where one or both side guards are bend inwards, but I have not seen this on the more sturdy katars. 
 
Regards 
 
Jens
		 
		
		
		
		
		
		
		
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