The best chainring bolts you can buy? Full titanium, dual hex sockets, chainring bolt tool and coin compatible. These puppies will never rust, corrode, seize, strip, break, or weight you down.
Use these high quality bolts to mount the Split Belt M1 belt ring if yours don't work. They will fit the majority of bolted crank spiders.
They also work great on most traditional 2x chain rings and 1x rings with the optional spacer.