INNO Racks - Truck Bed Rack System - Set of 4 Pickup Truck Rack Stays with C-Channel Track Systems COMPATIBILITY - These truck rack stays are compatible with square or round bars and can be used with C-Channel track systems. HASSLE-FREE - Hardware is included and no drilling is required. SET OF 4 - This set includes 4 truck bed stays for c-channel tracks systems with secure locking ability. TRANSPORT - Allows for mounting of attachments above the truck bed, freeing up space for carrying gear and cargo below the truck rack. CONVENIENT - While transporting gear above the truck bed, the truck stays remain at a very convenient height for loading and unloading gear.