Heli-Coil SAE Thread Repair Kit - 5521-10 Part #: 5521-10 Line: HEL Heli-Coil SAE Thread Repair Kit Manufacturer's Defect Warranty Material: Stainless Steel Quantity: 6 Thread Direction: Clockwise Length (in): 15/16 Inch Length (mm): 23.794mm Drill Size: 21/32 Inch SAE Or Metric: SAE Drill Bit Included: No Internal Thread Size: 5/8-11 Inch Rockwell Hardness: 43-50 Tap Included: Yes Tensile Strength (psi): 200,000 To 250,000 psi Show More Show Less