Vantech P3000 Aluminum Ladder Rack for Standard Pickup Trucks

• Drilling Required To Mount To Adaptor Plate Uprights Bolt-On
• Upright Mounts adjustable from 21.25" - 28.25"
• (Add 1.5" for cross bars) (Add 5.25" for A20 Adjustable Guide)
• Includes 4X Endcaps, 2X Adjustable Guide (pair)
• 600lb Capacity Evenly Distributed

This ladder rack system is called the Bolt-On Rack because the uprights bolt onto the bases.  The Mounting bases require drilling to mount to the pickup bed.  For a No-Drill option the P3000 Clamp-On ladder rack Is Available here

Adjusting the height is easy just loosen hardware on mounts - depress the peg on the upright- move leg to one of the adjustment points - lock in the peg re-tighten hardware.