Engineered with the latest CAD/CAM technology. Precision manufactured using laser cutting, CNC machining and robotic fabrication for accuracy never before possible. Constructed from High Form 50 (A-715-50) material for 38% greater strength over 1010. 4 internal gussets provide added support for axle tubes and cross bracing to eliminate deflection. 1" wide .25" thick continuous ring flange adds to structural stability. 7" deep tube sockets assure precise positioning and critical alignment for popular 3" axle tubes. Approved by NASCAR.