Nipple wrench?

[Delight523]

I have some antique percussion shotguns and have damaged or badly plugged nipples. I see a lot of nipple wrenches for sale on Amazon. Some are for #11 or #12. Not sure what size I have on my guns. Is there a universal wrench?

 

[anonymouscowherd]

Dont think so but Ive seen musket cap on one end and 11 on the other from somewhere

Problem isnt just the nipple size but base shape etc While anything relatively recent is fairly standardized that may not be the case with originals