30 Pcs M4 M5 M6 M8 M10 M12 M14 For Helicoil Thread Repair Kit Pro Coil Drill Tool Car Repair Tools Coarse Crowbar Thread Repair Set Features: Thread repair kit including 25/15/10 wire thread inserts. Ideal for restoring damaged threads suitable for engine repair and other automotive. Applications for steel cast iron and aluminum. Can be used in daily repair car repair drilling machine etc. Made of high quality material sturdy and durable in use. Description: Color: as shown Thread inserts material: Stainless steel Thread tap and the drill material: HSS Wrench: surface electrophoresis Thread specification: M4*0.7 M5*0.8 M6*1 M8*1.25 M10*1.5 M12*1.75 M14*2 How to use: 1.Drill out damaged thread using correctly sized drill bit(supplied) 2.Tap re-drilled hole using tap supplied 3.Load coiled insert into applicator 4.Screw coil into casting 5.Using lug breaking toolbreak off tag on insert 6.Thread is repaired and ready to use.