PortaMate HTC1000-400 Pound Capacity Universal Mobile Base Adjusts to fit a wide range of large woodworking tools Expands from 14 by 14 inches to 31 by 31 inches square Expands to 19 by 43 inches in a rectangular configuration The 14-inch rails have holes spaced every inch for maximum versatility Extruded aluminum foot lever lets you lock the base in place