Features:*30Pcs/Set Metric Thread Repair Insert Kit M4*0.7Coil Helicoil Set Tool*100% brand new and high quality*Made of high quality material, sturdy and durable in use*30pc thread repair kit including 25 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.Specifications:*Material: HSS*Model: M4x0.7How to use:1. Drill out damaged thread using correctly sized drill bit(supplied)2. Tap re-drilled hole using tap supplied3. Load coiled insert into applicator4. Screw coil into casting5. Using lug breaking tool,break off tag on insert6. Thread is repaired and ready to use.Package Contents:25*Thread inserts1*Lug breaking tool1*Installation tool1*Wrench1*Thread tap1*Drill bitNote:1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2.Please allow slight manual measurement deviation for the data.