It is a simple screw thread corrector that simply holds the screw to be repaired with the V-shaped receiving part and the two blades of Ness, tightens it lightly, and turns it in the direction of the arrow. Since the two blades move up and down, any screw within the applicable range can be used (inch and left and right screws are shared). There is play in the two blades, and it is automatically applied to screws of any pitch. It is a type that supports 60 degrees of cutting edge.
* If it is difficult to turn the screw when turning it, re-screw it. If you force it, the blade of the main body may break.
Trusco Part No.: 112-7349
Range of Application: 17mm to 38mm (11/16 to 1 1/2 inch)
I used it to repair the thread of a crushed spindle, but I could hardly use it because it was a short part for its diameter. Since there is no protector or cushion on the jaw part, the screw thread will be scratched. (Translated by machine.)
I bought it following Ness One. Unlike dies, it is very convenient because it can handle screws of various diameters. I think the sharpness is also excellent. (Translated by machine.)