Buyers Products Bumper Vise Mount provides sturdy support for a vise on most mechanic, service and utility truck body bumpers. Rugged 3/16 inch steel is black or white powder-coated to resist corrosion. It has pre-drilled holes that allow the mount to be adjusted in 1 inch increments from 2 to 8 inches above the bumper, and enable it to accommodate Wilton?? vises with 3-1/2, 4, or 4-1/2 inch bolt centers. Mounting hardware is included.