BT-SET-M METRIC Rip Fence Micro-Adjuster for Ryobi BT3000/BT3100 & Craftsman 21828/22811
The BT-SET-M Micro-Adjuster moves the rip fence 1.0 mm per turn and has tic-marks every 0.1 mm. For those who don't think in metric, 0.1 mm is just slightly bigger than the thickness of a human hair!
Slides into the front rail and under the side of the rip fence, locks in place with the red clamping knob anywhere along the rail. Simply turn the spindle to adjust the rip fence to the right or to the left.
Clamping knob can be moved to the opposite side allowing it to be mounted to the right or left of the rip fence.
Comes with instructions for use
Manufactured by Ballauf Devices
An inch based fractional version is also listed on eBay