When I was unpacking for a friend a model 88 combo (18.5" and 28" barrels with shotgun) a cross looking tool(?) of blued steel with one hole on one point of the star that was in a small plastic sealable bag. I looked at the manual but could not determine what it is for? Pardon the question but I have an 88 with 18.5", 28", and a 24" scoped rifled slug barrel and have not seen this before. Any ideas?