Thread Repair Kit Insert Types Included Helical Inserts Compatible Material Metal Drill Bit Sizes Included 8.3 mm Finish Plain Helical Insert Type Free-Running Insert Length 15/32 in Insert Material Stainless Steel Material Grade/Class 18-8 Number of Inserts 20 Number of Pieces 24 Number of Sizes 1 System of Measurement Inch Tang Style Tanged Tap Sizes Included 5/16 In.-18 Thread Direction Left Hand Thread Size 5/16 In.-18 Thread Type Coarse Insert Outside Diameter 0.4 in