ITEM NAME:55*20mm Carbon Steel Metric Thread Repair Insert Kit M6 Helicoil Set Tool dfs Descriptio n Specification: Material: carbon steel Color: color Handle size: 55*20mm Features: Brand new and high quality. 30pcs thread repair kit including 25 wire thread inserts. Ideal for restoring damaged threads, suitable for engine repair and other automotive. Can be used in daily repair, car repair, drilling machine, etc. Made of high quality material, sturdy and durable in use. Product list:30PCS set of thread repair tools Note: 1.Please allow a little size error due to manual measurement. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. Whatever the ending's perfect or not, you can't disappear from my world 30PCS thread repair tool.Handle size: 55 20mm. 30pcs thread repair kit including 25 wire thread inserts. We'd like to settle any problem in a friendly manner. Product list:30PCS set of thread repair tools. Material: carbon steel.