Comparison : Item # TNRA54-VTHD-ST, 0.642/0.648 Inch (in) Inscribed Circle (i.c.) Triangle Laydown Threader Blank Cutting Tool Insert
Item # TNRX22ER, 0.517/0.523 Inch (in) Inscribed Circle (i.c.) Triangle Laydown Threader Blank Cutting Tool Insert
Item # TNRX22NR, 0.517/0.523 Inch (in) Inscribed Circle (i.c.) Triangle Laydown Threader Blank Cutting Tool Insert