Single ring bolts to mount Absoluteblack chainrings to the crank arms. Bolts have torx T30 interface for greater reliability.Weight:Set of 4 - 6.2gSet of - 7.9gMaterial: CNC machined 7075Finish: Type II anodizingWhich bolts you should order:ÊShort bolts for:104bcd Oval 34 / 36T110/4 and 110/5 CX Oval: 38T104bcd round 32 / 34 / 36 / 38TbashringLong bolts for:110/4 & 110/5 bcd for outer+inner ROAD Oval chainrings130/5 bcd for outer+inner ROAD Oval chainrings104bcd Oval 26 / 28 / 32T64bcd round 26 / 28 / 30TÊ94bcd Oval 30 / 32 / 34Tall CX Round ringsÊImportantFor 30T 104bcd - bolts are included in the price of chainring already.For XT M8000 and XTR M9000 - use original Shimano bolts that come with crank.For Sram Road Oval chainrings - use original Sram bolts that come with crank.If you change Road inner oval chainring only and keep outer as round - use original bolts.Important note for CX Round ring users only:Sometimes there may be a need to file down female nuts to achieve proper fit. This is because each crank has tabs of different thickness and it is not possible to make one fit all solution. Bolts itself are fine.MTB users will not have to do any modifications to bolts or nuts.