Anodized aluminum chainring bolt / nut set.
There are two types, one for thin teeth (4.5mm) and one for thick teeth (6.5mm).
[SPEC]
Material: Aluminum
Recommended tightening torque value: 8-9Nm
Size: M8 x 4.5mm,
M8 x 6.5mmScrew pitch: 0.75mm
Color: Black