Also, on the top of the tool (fixed blade end) there are 2 blades. Adjustable is one blade. This can be a pain in the butt when trying to straighten short threads, as only one top blade threads along with the single bottom. The offset can cause the tool to cock off to the side and remake the threads at an angle or skip over a damaged thread like when the end of the shaft is hit from the end bending the threads down on like 1/4 round of the threads. Patience while working the tool back and forth a little at a time can overcome the issues mentioned above
~ Gimp ~