VEVOR Cross Slide Drill Press Vise, 6 Inch Jaw Width, 2 Way X-Y Axis Bench Vise, 5.7 Inch Max Jaw Opening, Heavy Duty Cast Iron, Workbench Vice Clamp, for Woodworking Drilling CNC Milling Machine

The mounting slots have a width of 1/2 inch (approx. 12.7 mm to 13 mm) and a length of approximately 3.5 to 4 inches (approx. 90 mm to 100 mm).