Decent quality high speed steel tap.
M18 x 1.5mm THREAD TAPER & PLUG SET by US PRO TOOLS HSS thread repair tap
M12 x 1.25mm THREAD TAPER & PLUG SET by DSD TOOLS HSS thread repair tap
M14 x 1.5mm THREAD TAPER & PLUG SET by US PRO TOOLS HSS thread repair tap
M10 x 1.25mm THREAD TAPER & PLUG SET by US PRO TOOLS HSS thread repair tap
131Pcs HSS Thread Repair Kit Drill Helicoil Metric Set Heli Coil Tap Insert Case
UK 131Pcs HSS Thread Repair Kit Drill Helicoil Metric Set Heli Coil Tap