Bottom bracket lock ring removal tool

I have a lock ring on my bottom bracket that is odd looking with 4 small identical teeth, followed by a larger tooth then pattern repeat 2 times (I.e. 4 small teeth, 1 large tooth, 4small teeth 1 large tooth, 4 small, 1 large.
I'm attaching a snapshot of it in case anyone knows what tool unlocks it

just look in your local bike shop. this is a standard tool. nothing special. every bike shop has them to replace bottom brackets. if you don't want to buy the tool they may help you out for a few bucks.