Thread Repair Kit Insert Types Included Helical Inserts Compatible Material Metal Drill Bit Sizes Included 3/8 in Finish Plain Helical Insert Type Free-Running Insert Length 17/64 in Insert Material Stainless Steel Material Grade/Class 18-8 Maximum Hole Diameter Not Applicable Number of Inserts 12 Number of Pieces 12 Number of Sizes 3 System of Measurement Inch Tang Style Tanged Tap Sizes Included 1/8 In.-27 Thread Direction Right Hand Thread Size 1/8 In.-27 Thread Type NPT