I have been pondering a metric Snap On rethreading tap and die kit for about a month, and saw Craftsman has one for $49, versus the $100 Snap On. I went for Craftsman and their warranty. I wanted to clean out all the rusty bolt holes in my tub in preparation for a Rust Bullet coating and Linexing. I used a bit of PBlaster and away I went on all the M6 and M8 holes. The feeling of hand threading NEW body bolts into those holes was QUITE satisfying.