Beats me. Trouble is most techs that used it are dead now.
Reminds me of other special tools in the biz. Remember
these ?
Inside out socket for Maggies
Fork pronged tool also for Maggies
Anode lead removal tube for Sony coax HV leads.
Square driver for Zenith antennas & tuner gears.
Those Motorola transistor screws.
The 3 slotted driver for Zenith & others.
And last but not least ISO phillips screwdriver set to get out Jap screws that
would otherwise strip..........
73 Zeno
LFOD !