Hi,

Looking at 'boom boom' - Anders does a good tutorial on it.

any idea what the young lady guitarist playing it here:

【Rei】PLAYS... John Lee Hooker / BOOM BOOM - YouTube

is using on the little finger on her fretting hand? - looks like some sort of slide which can flex at the knuckle.

I tried google searches under 'type of slide' & 'flexible slides' but dont see it , so maybe it's named something else?

Thanks in advance,

Mike