Thread Repair Kit, Insert Types Included Helical Inserts, Compatible Material Metal, Drill Bit Sizes Included 1/4 in, 13/32 in, 13/64 in, 21/64 in, Finish Plain, Helical Insert Type Free-Running, Insert Length 7.5 mm, 9 mm, 12 mm, 16 mm, Insert Material Stainless Steel, Material Grade/Class 18-8, Maximum Hole Diameter Not Applicable, Number of Inserts 4, Number of Pieces 60, Number of Sizes 3, System of Measurement Metric, Tang Style Tanged, Tap Sizes Included M10-1.50, M5-0.80, M6-1.00, M8-1.25