Clamps around tubing and eliminates the need for welding on chassis. Accepts Pro-werks Bottle Mounts and Pro-werks Universal Clamps when attachment to round tubing is necessary. Ideal for add-on accessories such as fuel pumps and electronic devises. Mount base is 3-1/2" wide end to end and the 1/4" bolt spacing is 2-5/8", measures 1/2" thick.