Specific for locks
			 
			 
			
		
		
		
			
			The Lock Ease is specifically for locks.   A quick spray should be all you need.   It should not cause any damage unless you spray far too much in the lock.  Follow the directions and you should be fine.    Again,  what do you have to lose,  It's already broken.
		 
		
		
		
		
		
		
		
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