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E-Z Coil™ Thread Repair Kits

Don't start your next project without the E-Z Coil™ Thread Repair Kit from E-Z LOK. Our large helix coil kit selection includes all the essential items you need to install and repair tapped holes in softer metal materials like cast iron, mild steel and aluminum.


Depending on your specific needs, we offer both standard and budget-friendly equipment in an assortment of sizes. Each E-Z Coil™ Thread Repair Kit includes a set of inserts, an STI tap and an installation tool; the standard edition also includes a tang break tool and drill.


Each helix coil kit is offered in three separate styles:

  • For spark plugs
  • In metric sizes
  • In inch sizes

In addition to what we offer below, E-Z LOK™ has kits for other applications, such as the E-Z Knife™ Thread Repair Kit for hard wood and E-Z Hex™ Threaded Insert Installation Kit for Soft Wood.


View All Available Kits




E-Z Coil™ Threaded Inserts for Metal - Economy Kit

E-Z Coil™ - Economy Kits

Available In:

  • Inch kits from #2 to 1-1/2
  • Metric kits from M3 to M39
  • Spark plug kits from M10 to M18


Kit includes:

  • Threaded Inserts
  • STI tap
  • Installation Tool

E-Z Coil™ Threaded Inserts for Metal - Standard Kit

E-Z Coil™ - Standard Kits

Available In:

  • Inch kits from #2 to 1-1/2
  • Metric kits from M3 to M39
  • Spark plug kits from M10 to M18


Kit includes:

  • Threaded Inserts
  • Drill
  • STI Tap
  • Installation and Tang Break Tool