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Split pins are intended for single use only, when they are removed they should be replaced with new split pins to prevent the possibility of fracture due to fatigue damage. For areas where repeated assembly and dis-assembly is needed consider using ring pins as a preference to split pins. With regard to size selection, split pins are sized for the hole that they need to pass through, both on assembly and dis-assembly. This means that the diameter of the new split pin is significantly smaller than its hole to allow it to be pulled out, even after the bent ends of the split pin have been straightened out with the aid of a screwdriver and pliers, they are never quite straight and the under-size of the split pin compared to the hole allows for an easier removal than if the split pin were a more exact match for the hole.