The problem: The arch of the guitar top, and especially the back, will change the router alignment. Without the TrueChannel, a standard router base will tilt, causing the routed channel to be too deep or too shallow; the bindings won't fit right. TrueChannel keeps the router vertical for a square ledge. Rock-steady aluminum router support post with carriage. Sliding support brackets (4), adjustable for body shapes and heights.Shaped plywood guitar body cradle. 9 router bearing set with wrench Stewmac router blade in router.... The item "STEWMAC TRUE CHANNEL ROUTING JIG (ROUTER INCLUDED)" is in sale since Thursday, December 3, 2020. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Guitar Building & Luthier Supplies". The seller is "rocco33" and is located in Nanticoke, Pennsylvania. This item can be shipped to United States.