Thread Repair Tool Compatible External Thread Size 11/16 in to 13/16 in Compatible Insert Diameter Not Applicable Compatible Insert Length Not Applicable Compatible Insert Material All Materials Compatible Insert Style Internal Thread Compatible Insert Type Not Applicable Compatible Internal Thread Size 11/16 in to 13/16 in 16mm to 20mm Compatible Thread Direction Right Hand and Left Hand Compatible Thread Type Coarse Extra Fine Fine Material Steel Overall Length 4 3/8 in