Trend Adjustable Routing Jig Frame & Guide System for Creating Square and Rectangular Recesses, Slots, and Face Panel Molds with a Router, VARIJIG - Router Accessories - Amazon.com
Variable-Size Dado Fixture for a Router - FineWoodworking
Woodpeckers Variable router jig
ELEVATE | Variable M&T Routing Jig- Luthier Tool
If you frequent the router, you need to check out the VRJ (Variable Router Jig). It makes for quick and easy setups for mortises, inlays, pockets, and... | By Woodpeckers - Facebook
Exact Width Dado Jig – ShopWoodpeckers.ca
PRO Slab Flattening Router Jig W/adjustable Height Free - Etsy