1. Each Bracket Joints connect with Four/Six bolts that built upon the X-35 bars which Reinforced the bars rather than weakening them.
2. Over Cab. Extension: 55''; Over Cab. Extension width adjustable: 45''~56.3''.Side Bar Extension:53.5''~90''; Fits 5'~8' bed
3. The extension top bars fit all the full size or semi truck beds. The adjustable range covers inner bed width from Min. 51'' Max.71''. Product Height: 30.5'' to the top, 28'' to the top cross bar.
4. The unit has been weight-tested of 1000lb+ loads.Powder Coated Matte Black and Matte White Paint
5. This product requires DRILLING HOLES on your truck.

The upright plate is a flat "L" shape base which has three drilling holes for flexible installation, and you only pick two that fits your truck; and yes, we provide all bolts and nuts in the hardware package for installation.

1. Some tool boxes, camper shells & Tonneau covers will affect the installation of this unit;
2. Bed rail top made of fiberglass instead of metal for some rare truck models like F-150 super-cab, customers complain it not sturdy for heavy-duty purpose after making holes;
3. There are track system installed on the inner bed-wall like the New Toyota Models which blocked our mounting plates;
4. Bed width is too small for the minimum extension of 51''.

More Option:
X39-SC Truck Rack with 30'' Short Over Cab Ext.
X39-B Truck Rack with No Cab Ext.