Retrax 20401 PowertraxONE Retractable Truck Bed Cover | fits Chevy & GMC 5.8' Bed (04-06) & (07) Classic Incredibly strong and easy to use - Features industrial-strength aluminum construction and opens and closes with the push of a button Low profile design - Our front canister cover remains flush with the rolling cover Lockable in any position; Secures your valuable cargo or stays open whenever and wherever you need it Unlimited hauling flexibility. Great for 5th wheel towing. Improves mileage by up to 10 Percent UV Protected; No Fading, No Maintenance