<p>Installation of model X33 truck rack requires drilling on the bed rail.</p><p>It features the extendable top cross-bar which can be adjusted for different size bed width.</p><p>The adjustable range covers inner bed width from min. 49" to max. 69". The height is 28.5" to the clearance and 26" to the cross bar.The upright mounting plate is a flat L-shaped plate with five (5) drilling holes.Please pick two (2) that fits your bed rail.</p><p>A total of 8 bolts, nuts and washers will be included with the hardware package.</p><p>Always consult us for non-drilling options & compatibility issues. This products is weight-tested as shown in the listing pictures,and from feedback you should know the quality we provide.</p>