Nu-Thred® files are the highest quality with cross-cut and depth proportional to the thread pitch,

so file will not skip or jump out of fine pitches. Our files are milled , not cold-formed, so our cutting teeth

actually have sharp edges which allow the file to do the work rather than the mechanic. Our file teeth also

come to a sharp point which allows the teeth to get to the bottom of the thread and remove any rust or gunk

that has accumulated there.

Nu-Thred® files have been made to this high standard   since 1947 in Reading, Pennsylvania,

                     and will renew damaged external threads of any diameter (right or left-hand).