With this Craftsman Master Rethreader Set you can easily recondition those dirty, gummed, nicked, and just-plain-nasty old fasteners. The rethreader works slowly down the threads and cleans them, and it’ll also help correct those crossed threads, but it won’t cut new threads — you’ll need a regular cutting tap and die set for that.
The set contains the most popular sizes of National Coarse, National Fine, and Metric rethreading taps and dies as well as standard and metric rethreading files. A guide sheet lists all the items in your set, and it all fits inside a blow-molded case. I own one of these sets and it’s great for cleaning up old fasteners before reuse, especially the ones with old thread-lock or sealant on them.
The Craftsman Master Rethreader Set sells for about $50.