Extralite chainring bolts are made ​​of lightweight aluminum. They feature Torx T30 bolts instead of the standard allen bolts. The female counterparts are self-locking, ensuring a secure fit of the chainrings

technical data:

Material: 7075 T6 aluminum
Quantity: 5 pairs (5 male and 5 female)
Weight: 9g
Color: black,red