These brackets are designed to be welded to a frame or boxed/rectangle tubing. The brackets are plasma cut from .25" steel and the mounting surface is 2.5" wide by 3" tall. The furthest hole is 6" front the 2.5" mounting surface and each hole has a separation of 1", all holes are .5" and can be easily enlarged. A .25"x2.625"x12" strip is supplied so the brackets can be boxed in for added support & strength. The brackets can also be used in a 4 link system, where the extra support tab would be cut off and the brackets can be welded to the top of a flat axle truss. Two brackets and one strip are included.