PLEASE READ FULL DESCRIPTION THESE 3D PRINTED LINK BRACES WILL HELP STIFFEN UP THE FRAME WHEN RUNNING THE UPPER LINKS MOUNTED DIRECTLY TO THE CHASSIS THE HOLLOW BALL OPENING IS MADE FOR A 7mm WIDE BALL (TRAXXAS ROD END HOLLOW BALL) THE BLOCK AT THE CENTER OF THE BRACE IS 10mm, 20mm & 30mm WIDE YOUR LINKS WOULD SIT AT 17mm, 27mm OR 37mm APART CENTER TO CENTER OF THE HOLLOW BALL BRACE WIDTHS: IF YOU RUN A OUR STANDARD 78mm SKID PLATE YOU WILL NEED THE 76mm WIDE BRACE THIS IS DUE TO THE 67mm (PROVIDED WITH OUR CHASSIS) OR 65mm STAND OFFS RAN TOWARDS THE BACK OF EXISTING CHASSIS IF YOU RUN A 70mm SKID PLATE, YOU WILL NEED A 70mm WIDE BRACE USUALLY THE REAR STAND OFFS RAN WITH THIS SKID PLATE WIDTH WOULD BE THE SAME WIDTH OR 65mm AND SHOULDN'T AFFECT THE MOUNTING BRACE WIDTH MOUNTING HOLE SPACING IS .25" (6.35mm) CENTER TO CENTER DO NOT OVERTIGHTEN THE SCREWS