Here's what other sites are saying:
Tracks Walnut Knob The Walnut Knob by Tracks is in case you lose one.
Tracks Walnut Knob - Replacement Walnut Knob for Tracks by Hiking Poles.
- Massey's Outfitters
Replacement walnut knob for use with the Sherlock Walking Staff.
If you're constantly taking off the Walnut Knob on your Tracks Staff to expose the camera mount functionality, chances are you're going to lose it, so be ready with a replacement Walnut Knob from Tracks.
- Mountain Gear
Leki Aergon Photo Adapter
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