We The People Arrow Cassette Hub material: 6061-T6 alloy refined hub-shell | 4130 crmo female axle | Chromoly axle nuts | cnc cones style: RHD (right-hand drive) axle size: 17mm 7075-T6 alloy femaile axle | 3/8" thread and crmo bolts driver: 9 teeth | full bushing driver system | ratchet is machined into 1pc driver from maximum strength spoke holes: 36H bearings: 3x quality sealed barings color: black additional information: specially designed cone washers with knurled outer surface unique 12mm female bolt system incl. 2x bearings on non-drive side to increase hub life RHD/LHD switch drive system 1pc pawl & spring system