Heli-Coil Metric Thread Repair Kit - 5542-8 Part #: 5542-8 Line: HEL Heli-Coil Metric Thread Repair Kit Manufacturer's Defect Warranty Material: Stainless Steel Quantity: 12 Thread Direction: Clockwise Length (in): 9/16 Inch Length (mm): 12mm Drill Size: 21/64 Inch SAE Or Metric: Metric Drill Bit Included: No Internal Thread Size: M8-1.0 Rockwell Hardness: 43-50 Tap Included: Yes Tensile Strength (psi): 200,000 To 250,000 psi Show More Show Less