Not sure if the 16v flywheel has the same teeth as the 20vt flywheel but that's the "universal" Fiat flywheel locking tool I got and it didn't fit the 20vt.
See my clutch thread here:http://www.fiatcoupeclub.org/forum/ubbthreads.php?ubb=showflat&Number=1607465
I cut 3 of the teeth off it and then it fitted OK.
The BGS version is available for £10, eg. ebay # 281753364371