A combination of stainless steel hooks and mild steel crossarms. The box-like welded construction gives the X crossbars superior strength and enables them to survive repeated stripping. Our stock components of the X crossbars can be ordered with "V" or "C" bottom, hooks welded perpendicular to the frame. X-BARS-W-LT (For lighter parts) 0.091" diameter, stainless steel wire hooks welded to 3/16" mild steel cross-wires. Standard crossbar lengths are 20", 25", and 30" with spacing of 2" or 3".