Easy to set up, this jig ensures accurate, repeatable results when making 1/2” and 3/4” box joints using any 1/2” router. To create snug joints every time, the supplied eccentric guide bushing lets you adjust the position of the cutter relative to the template to fine-tune the fit. You can use the jig on a router table, or operate the router freehand, guiding it manually along the template affixed to a stationary workpiece.