MANUFACTURER PART NUMBER:TBT07. Model Number: TBT07. Fuel Mixture Formation. • Contents: Hex Keys; 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10mm, Ball-End Hex Keys; 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10mm, Hex Socket Bits; 3/8″Sq Drive; 4, 5, 6, 7, 8, 9, 10mm, 1/2″Sq Drive; 12, 14, 17, 19mm.