M2 x 0.4 HSS STI Tap, HSS Tapping Drill, 20 pcs 1.5D Stainless Steel Heli-Coil Wire Inserts. M2.5 x 0.45 HSS STI Tap, HSS Tapping Drill, 20 pcs 1.5D Stainless Steel Heli-Coil Wire Inserts. M3 x 0.5 HSS STI Tap, HSS Tapping Drill, 25 pcs 1.5D Stainless Steel Heli-Coil Wire Inserts.