Flat Bottom Shock Mounts. Set of 2 Shock Mounts Boxed, these mounts are CNC cut from 1/4 inch steel plate, precision bent, tumble finished, and ready to be welded in. Like our other boxed shock mounts, using these is as Easy as it gets! These mounts are designed to be welded directly to your axle or any flat surface (as you will notice Inch the picture, the two opposing sides are flat and the third side is cut on a radius to fit any axle), and are three times as stiff as using two separate tabs. Details: