Henry's I have had have had screws for the jaw inserts. I have seen other vises where somebody drilled all the way through, maybe to get the screw out ! I have seen "Bulldog" branded vises, models 300, 350, 400, 450 and 500 (3, 3.5, 4, 4.5 and 5 inch widths) and even one with a Henry label on...