Thread Repair Kit, Insert Types Included Helical Inserts, Compatible Material Metal, Drill Bit Sizes Included Not Applicable, Finish Plain, Helical Insert Type Free-Running, Insert Length 9.525 mm, 11.1125 mm, 12 mm, 12.7 mm, 19.05 mm, Insert Material Stainless Steel, Material Grade/Class 18-8, Maximum Hole Diameter Not Applicable, Number of Inserts 6, Number of Pieces 32, Number of Sizes 1, System of Measurement Metric, Tang Style Tanged, Tap Sizes Included Special STI