Keep Your Spline Cuts Centered :Cutting spline joints freehand can easily drift off the centerline. The self-centering guide bar design keeps your trim router aligned between the stock rests, helping your spline slots stay centered and consistent on woodworking joints Designed for Large Furniture Corner Joinery :When you're working on large furniture assemblies, a table saw setup isn’t always practical. This jig lets you bring the router directly to the workpiece, making it easier to cut spline joints on large furniture corners, boxes, frames, and other woodworking projects Steel Construction for Stable Routing :Made with steel construction and finished with a black ED coating, the jig provides a rigid platform that helps maintain stability while routing spline slots. The solid structure is built for repeated use in a woodworking shop Compatible with Most Trim Routers :The adjustable dual guide bars allow the jig to fit most single-hand operated trim routers with base diameters up to 4.17 inches. Once the guides are set and locked, the router stays centered during the routing pass Easy Alignment and Controlled Cuts :Front and rear lateral position indicators help you line up the jig with your spline centerlines. Non-slip pads on the stock rests help keep the jig steady during routing, supporting cleaner spline slots on woodworking projects, Manufacturer: O'SKOOL