Box One™ Chainring Bolt kits include five 8.5-mm front bolts, five 6-mm front bolts, and five 5-mm rear nuts so they will fit just about any chainring/crank combination, including chainrings and cranks with threaded holes.
8.5mm/12mm Male Bolt
6.5mm/12mm Male Bolt
4mm/12mm Female Bolt
Thread Pitch M8x0.75p
5mm Allen Key
Slotted Female Bolt