INCRA's Jumbo Right Angle Fixture is designed to be used in conjunction with an INCRA router fence to keep boards square to the fence and square to the table when routing box joints or dovetails into a board's end grain. The 10"-wide face plate is an upgrade of the original 6" version and provides ample support for larger projects. A generous number of T-slots on the face plate allow you to mount sacrificial zero-clearance backing boards and other custom fixtures with ease. Two adjustment screws located where the fixture rides the fence control side-to-side movement, and a third screw holds the fixture snug against the fence as it's being loaded. This right angle fixture features wooden runners that are gentle on your router bits in the event of contact and are easily replaceable when necessary. The Jumbo Right Angle Fixture is compatible with all INCRA aluminum router fences.