>>28566136
>What's the deal with these?
shitty cheap version of a brake caliper tool set.
>why does the piston screw at all?
to adjust for the parking brake/emergency brake
>Aren't hydraulic brakes supposed to be self adjusting?
yes, but that's not related to brake piston being twist type
>How does the piston get unscrewed
by using the brakes
>am I supposed to go in there now and then and unscrew it a little?
If you are changing the brake pads you will need to "screw" it down fully
>What happens if I never screw it at all and let the piston take up the slack?
then you won't be able to fit new brake pads
>This all seems like boomer shit that shouldn't exist any more.
sorry your pops wasn't around when you're growing up. It's not hard to do with a simple pair of pliers, or you can borrow the kit from O'Reilly's