These single chainring optimized boltshave a 4 mm hex socket on the bolt and a 6 mm hex socket on the nut so no spanneris needed. These are 6mm long so they work perfectly with any bolt on single chainring that does not have threaded standoffs.

Weight:4 bolts – 10g

Material:7075-T6 aluminum

Size:M8 x .75 x 5

Torque spec:7-8NM torque w/ light grease on threads only