If using a power tool, use a low torque setting and apply force gradually. Multiple sizes: The 13-piece bolt and nut removal tool set has easy-to-read markings: 3/4" (19mm); 11/16"; 17mm; 5/8" (16mm); 9/16" (14mm); 13mm; 1/2"; 12mm; 7/16" (11mm); 10mm; 3/8"; 5/16" (8mm); 1/4".
