Since Don has already broken the rules, I’ll jump in. wink
They will only work on thin material. If the drill tip hasn’t broken through the tap portion won’t start.


Kevin
1951 Chevy 3100 work truck
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Photos
1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.