Similar to E. Emerson XWJ Part, but with a few alterations. Wide Jaw for E. Emerson Contractor Series Straight Edge Clamping Tool Guides.Check out End Stop: http://www.thingiverse.com/thing:379406Each side of the Contractor Series E. Emerson Clamping Straight Edge Tool Guide is a little different. I made these particularly tight so that they do not have to be screwed into place. I did however recess the screw so that a #8 machine screw could fit in to secure the wide jaws. I would print at a high infill. Room for extra scrap for creating custom offset guide so that you can attach to the jaws and use that to line up your cuts, etc. Replaces part XWJ. List of Tools referencing: http://www.eemersontool.com/products/products.html#