You can find all the tools you need to properly maintain your bike at Escapa.
Praxis M24 Crank Arm Remover
SPECIFICATIONS
Praxis M24 CRANKSET ONLY | REPLACEMENT BOLT/SELF-EXTRACTOR
8mm hex for installing and removing the crank arm 50Nm Tightening torque
Screw Information - M15 x 1.0 Pitch, 15mm Length
A 5/8" hex wrench is used to unscrew the extractor if ever necessary.
This bolt/extractor is found on all Praxis M24 cranks and on many Praxis eCranks.