and high quality 30pcs thread repair kit including 25 wire thread inserts. Perfect for restoring 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. How to use: 1. Drill out 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. Colour:red+silver Material:Stainless steel+HSS Package Contents: 25 x M8 screw sleeve 2 x repair wrench 1 x 8.3mm twist drill 1 x screw sleeve tap 1 x small wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.