4 link triangulated upper for 1.750" tubing, adjustable from 25 to 45 degrees on either side allowing flexibility for most systems. A 2.63" mounting width accomodates our Heavy Duty Ballistic Joints with 9/16" bolt holes or XM-16 rod ends with spacers. Also available for our Ultra Duty Ballitic Joint at 3.0" width with 3/4" holes. Cut from .250" A50 plate. Includes ONE bracket. Part # BRK-1031Part # 1031