Cleaning jags are equipped with machined aluminum components that do not react with ammonia-based solvents, unlike brass parts, which may. This ensures that blue-green stains, which could be mistakenly interpreted as false positive indications of copper fouling, are not produced on your patches. Consequently, you can accurately determine when your bore is truly free of copper. Precision-engineered .22 Cal aluminum jag with female threading for optimal cleaning performance and durability All-aluminum construction with a pointed tip 8-36 internal threads Compatible with J. Dewey .22 Cal cleaning rods featuring 8-36 male threads