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Pinhead Seatpost or Saddle Lock with QR Key

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Prevents removal of your saddle or seatpost from your bike.

- Includes PinHead key (QR axle type)
- As Seatpost Lock; the collar fits 28.6, 31.8, or 34.9mm seat tubes
- As Saddle Lock; fits 27.2, 30.9, or 31.6mm seatposts
(please note, saddle attachment bolt must be vertical)