SET OF HELI COIL HAND TAP SET SIZE: ( 1 ) M20X2. 5 = 02 NOS. ( 2 ) M30X3. 5 = 02 NOS. MAKE: MIRANDA/ TOTEM/ ADDISON/ INDIAN TOOLS OR SIMILAR. Note: Material should be suitable for Tapping in HELICOIL thread of Traction Motor Stator used for WAP7 type Loco.