Yes its an edge guide, but geese PC couldn't you have made this a little nicer than you did? This guide works, but the casting is so rough ( and flimsy ) that it makes it hard to run the router smoothly along your work's edge. It really is that bad. Compared to the BOSCH edge guide the PC is marginal at best. I modified mine with a phenolic ( polyethelene ) material cut to the same size as the guides, and used 3M double sided structural tape between the phenolic " glides " and the PC guides, and it works much better. Come on PC, I know you sell enough of the 690 series routers and accessories to justify some improvement.