This Link Mount is designed to mount on a flat surface such as a truss. They are CNC cut and bent from 1/4" thick mild steel. The bend strengthens the mount so no additional reinforcement is needed. 2.63" inner width for the most large cartridge joints or 1.25 rod ends with misalignment spacers. Hole heights are 1.625" and 3.125" above bracket base. INCLUDES 1 SINGLE BRACKET.