Engine Brake Adjustment Tool 4.6&4.1mm Kit For Detroit Diesel DD13 DD15 DD16 GenericInstructions: 1. Insert a feeler gauge between the piston and the contact surface of the exhaust valve adjusting screw. 2. The gap adjustment must be made on the two driven piston adjusting screws on each cylinder. 3. The feeler gauge must be inserted laterally to clear the bridge. Specifics: Condition: 100% Brand New Color: Black Size: shown as pictures Type: Engine Brake Adjustment Tool(4. 6MM & 4. 1MM) Material: Steel Note?? 1. Do not insert a