Up to 3/16" Automatic Ratcheting Brake Line Cutter by Titan Tools®. Automatic Brake Line Cutter-Self-adjusting brake line cutter automatically adjusts cutting pressure and cuts 3/16" (4.75mm) brake line tubing-Ratcheting mechanism in the head of the tool minimizes space requirements and can be used in tight spaces directly on the vehicle-Faster and more precise than conventional cutters-Add 1/4" spanner to end of handle for increased leverage.