[Specifications and packaging]: Metric: 129pcs wire thread insert: 30xM5, 30xM6, 30xM8, 25xM10, 14xM12. 5pcs twist drill bit, 5pcs break pin tool, 5pcs installation tool, 1pc hex key, 5pcs tap. SAE: 129pcs wire thread insert: 30x1/4"-20, 30x5/16"-18, 30x3/8"-16, 25x7/16"-14, 14x1/2"-13. 5pcs twist dill bit, 5pcs installation tool, 5pcs break pin tool, 5pcs tap, 1pc hex key.[Function]: SAE & Metric thread repair tool kit for repairing damaged or stripped internal threads in automobiles and engines.[Material]: The installation tools take classic high speed steel construction, is robust and provides an efficient thread repair job.[Advantage]: Repair kit takes the most commonly used SAE and metric size bits and match the mounting job with good maneuverability to get your job done quickly and swiftly.[Quick Replacement, Safe Installation]: All components are packaged in a steel carrying case for quick and easy storage and removal.