[RRToadHall]

Yea I have those Irwin bits, they are in no way to be used for stud removal because you can not get a good square purchase on a stud. You need a stud puller, some freeze off and a bit of heat.

https://jmcautomotiveequipment.com/...KBuNxodX6KIb1LVJoAopDMklz14fiCecaAgRZEALw_wcB

I have 2 Snap-On stud removers from the 60's and they easily pull any size stud up to semi wheel studs.

 

[RRToadHall]

you are dead on mad, the studs are press fit, not threaded... at least on pre 99 P38s. Still a stud remover will pop them free and twist them out with very little effort.