Thread Repair Kit, Insert Types Included Helical Inserts, Compatible Material Metal, Drill Bit Sizes Included 4.2 mm, Finish Plain, Helical Insert Type Free-Running, Insert Length 6 mm, Insert Material Stainless Steel, Material Grade/Class 18-8, Maximum Hole Diameter 3.242 mm, Number of Inserts 20, Number of Pieces 24, Number of Sizes 1, System of Measurement Metric, Tang Style Tanged, Tap Sizes Included M4-0.70, Thread Direction Right Hand, Thread Size M4-0.70, Thread Type Coarse