Wolf Tooth Set of Chainring Bolts 104 x 30T Rings 10 mm long 4-Pieces BLKThese bolts are designed as a direct fit for 30 Tooth x 104 BCD threaded chainring. These are alloy bolts with 4mm hex heads and 10mm length. Designed for M8 x . 75 thread pitch 10mm long 4mm hex head Bolt length is laser engraved onto the bolt head for easy length identification 6 7 Nm installation torque with light grease on threads only Length 10 Material Aluminum Color Black