Moen T4570 cartridge nut removal

I want to replace cart# 1224 on my monticello widespread lav faucet.
I got the tool but the nut isn't budging. The tool probabaly needs some
holes to attach a lever. Is it okay to use wd40? Any ideas on how to get
it to budge? Thanks.

nut

WD-40 might damage/melt the plastic nut. Just grab the tool with Channellock pliers and turn it.