Insert Installation Tool, Compatible External Thread Size 3/4 In., 7/8 In., M20, M22, Compatible Insert Material 18-8 Stainless Steel, Compatible Insert Style 4 Keys, Compatible Insert Type Key Locking Inserts, Compatible Internal Thread Size 3/4 In., 7/8 In., M20, M22, Compatible Thread Direction Right Hand, Material Steel, Overall Length 2 in, System of Measurement Inch/Metric, Tool Type Insert Extraction Tool