I have a seaming base for my DeWalt Laminate trimmer. It has a slot in the side for the laminate to be trimmed, and you guide the opposite side of the base against to laminate that you want to join to. A router bit inside the base trims off the correct amount of the laminate in the slot to fit against the already attached laminate, IF the base is adjusted correctly. DeWalt seems to have discontinued their laminate trimmers, as I can't find a listing for them. I don't use my laminate trimmer much, but I don't know what I would do without one. My kit has 4 bases, and is very versatile.
Central North Carolina