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BlackJack Clamp and Guides have two T-tracks the full length of the clamp. This allows inventive woodworkers to build their own high fence, feather board mounts and other interesting and useful jigs that mount directly to these T-tracks. This hardware package is what you need to mount anything to the tracks.
Includes:
4 x #19031 T-nut
4 x #18120 knob.
Clamping range is 5/8" to 7/8"