The INCRA ShopStop is our most versatile stop. The vertical stop bar is adjustable up and down, it can be reversed, and it has a screw-based micro adjust. The Shop Stop is also expandable the top section can be slid into a second channel on the base section to make the interior wide enough to span an Incra fence and a wooden sub fence of up to 3/4. INCRAs patented positioning mechanics make it deadly accurate and completely repeatable. Compatibility: The Shop Stop works with all INCRA Router Fences, INCRA Track Systems, and standard, non-Flip IncraLOCK Cut-off Miter Gauge Fences. It is NOT compatible with Flip Fences for INCRA Miter Gauges. Shop Stop Features -Expands to accommodate any fence thickness up to 1-1/2 -Vertically adjustable to accommodateany fence height up to 3-1/2 -Micro adjustable for 1/1000 precision -Instantly set (or reset) to any position with machine shop -Accuracy and ZERO repeatability error