For your rear view mirror or to wear as a necklace, I machine real authentic 50 caliber cartridges matched with an authentic 50 cal copper jacket bullet. The cartridge has been fired and may have small imperfections as a result of firing and striking the ground. I attach the chain using a pin that allows swiveling. This will never come apart and is superior to the threaded or glued versions some use for bullet key chains.
I also make bullet cartridge pens, key chains and pencils from once fired casings.
Cut the chain to desired length with scissors. The cartridge has been modified and can not be used for reloading. Normal tarnishing will occur. Polish with brass polish as desired. Erratic driving or fast stops could damage the windshield. Not responsible for any damage or injury.
Thanks for looking.