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					Originally Posted by Chris Evans
					
				 
				ZhenjieWu 
 
Could you tell us a little more? Are you atlking about Okinawa or other pasrts of Asia? 
 
Cheers 
Chris 
			
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 Sure. Weapons like this were often used by Chinese local forces who did the same job as modern cops. Especially in the Tang dynasty (AD 618—AD 907). This kind of weapon was not in the list of weapons used by ancient Chinese regular army. Ancient Chinese cops used another weapon named iron ruler whose length was about 1 m. The third equipment of those people were  long iron chain, whose function seemed to be handcuffs. 
ZhenJie Wu