The hard index is about .19 thick and about 1.255 wide x 2.300 deep. That is what the factory tool holds. Notice the raised part at the bottom of the housing and the "extra" material on the reverse lever that makes the width come out to the 1.255 inches to match the rest of the levers. Both the shifters are early 64-65 Hurst A-Body 4 speed shifters.