I have 1 wheel cylinder bleeder that is 3/8 and the other 3 have "tits" sticking out that won't turn. They are internally threaded at 8/32. What is this thing and how do I bleed the brakes? Any info is appreciated. Jim


1953 Chevy 3100 3 window

1997 VW Rialta Motorhome
2011 Fusion