>>2006016I have 2 different hook spanners like that and almost never get good engagement with them on lockrings.
I usually use waterpump pliers.
Once the lockring is off you'll have revealed a section of thread on the bb cup which you could also remove with big pliers, if you don't mind destroying it.
>>2006019this works too
>>2005988imo servicing cheap pedals is kinda retarded. They're not really designed to be serviced and usually once you're done they aren't even nice and smooth.