Insert Installation Tool, Compatible External Thread Size Not Applicable, Compatible Insert Diameter 1/4 in, Compatible Insert Length 1/4 in, 3/8 in, 1/2 in, Compatible Insert Material 18-8 Stainless Steel, Compatible Insert Style Tanged, Compatible Insert Type Helical Inserts, Compatible Internal Thread Size 1/4 In.-28, Compatible Thread Direction Right Hand, Compatible Thread Type Fine, Material Steel, Overall Length 8 in, System of Measurement Inch, Tool Type Prewinder Type II