NIKA ARCHERY Carbon Arrows Crossbow Bolts 16 18 20 22 inch Powerful Shooting Target Hunting, Pack of 12

The media could not be loaded.  Having brought this brand before I thought I'd save myself a quid cheapest I could find.Bit worried about safety as half of the inserts there is a slight gap and have been glued in uneven also worried about the markings around the inserts the carbon shaft looks almost stretched where the insert has been knocked inNo issues with my other 48 bolts I have in this brand only thesePossible rejects from factory ? Maybe why they are cheaper