Features: Suitable for engine repair and other automotive applications, for restoring the damaged threads. 25pc thread repair kit including thread inserts, drill bit, thread tap, insert installation, lug breaking tool, allow you have smooth repairing experience. Applications for steel, cast iron and aluminum. Is a practical and handy tool, can be used in daily repair, car repair, drilling machine, etc. Made of high quality material, sturdy and durable in use. Specifications: Thread inserts material: stainless steel Thread tap and the drill material: HSS Wrench: surface electrophoresis Color: as shown Thread size: M6 X 1 X 8mm Scope of application: machine Weight: 240g 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 tool,break off tag on insert 6.Thread is repaired and ready to use. Package included: 20 x Thread inserts 1 x Lug breaking tool 1 x Installation tool 1 x wrench 1 x Thread tap 1 x Drill bit