Extang, Inc. manufactures America's number one selling pickup truck bed tonneau and tonno covers, pick up truck accessories, and tonneau - tonno truck bed cover products since 1982. Extang was the first tonneau manufacturing company in America to sell the tonneau - tonno pickup truck bed cover, tonneau pickup truck accessories, tonno pick-up truck accessories, tonneau truck bed covers, and tonno pickup truck bed covers nationwide. Extang engineers created the "No Damage, No Drilling, Clamp-On Aluminum Frame" tonneau truck cover and the tonno pickup truck bed cover systems.