Thread Repair Kit Insert Types Included Helical Inserts Compatible Material Metal Drill Bit Sizes Included 13/16 in Finish Plain Helical Insert Type Free-Running Insert Length 30 mm Insert Material Stainless Steel Material Grade/Class 18-8 Maximum Hole Diameter Not Applicable Number of Inserts 4 Number of Pieces 8 Number of Sizes 3 System of Measurement Metric Tang Style Tanged Tap Sizes Included M20-2.50 Thread Direction Right Hand Thread Size M20-2.50 Thread Type Coarse