Dewey Male Aluminum Jag
$4.95
Aluminum patch jags from J. Dewey with female threads, made to screw directly onto Dewey nylon-coated rods that have a male tip. Aluminum contains no copper, so an ammonia-based copper solvent will not turn a patch blue from the jag itself - what you see on the patch is coming from the bore.
If your rod has a female end (such as a Dewey Copper Eliminator rod or most other brands), use the Dewey Male Aluminum Jag instead. Match the jag to your bore diameter and use patches sized for the caliber.