This is for a Locking spring preloader. It essentially holds a shaft a precise position so the seatpost can be taken apart and reassembled. This fits Fox Transfer SL and Raceface Turbine SL in 30.9 and 31.6 sizes. This WILL NOT fit 27.2 sizes. It also will not fit non SL models.
This is made of 6061-T6 aluminum and is then CNC machined to a precise size. It is a raw machined finish.
This is for the tool only, no seatpost or seatpost parts are included.