Self-Locking Insert Kit System of Measurement Inch/Metric Insert Diameter Not Applicable Internal Thread Size M10-1.50 M12-1.75 M6-1.00 M8-1.25 Thread Direction Right Hand Thread Type Metric Internal/UNC External Overall Length 10.3 mm 12.3 mm 13.1 mm 16.7 mm Number of Pieces 36 Number of Sizes 4 Material Stainless Steel Material Grade/Class 18-8 Finish Plain Wall Type Heavy Wall Compatible Material Metal Manufacturer Location Made in USA Drive Type Slotted