Strength, functionality and great looks, for professional quality are yours with the Challenger line of storages boxes. Each box features twin commercial gas struts that lift lid automatically for easy, one - handed use lockable, quick - release stainless handles and patented structured foam filled lids that can stand up to even the most challenging loads. Seams are hand wielded for durability and strength and lids are bolted on to box body using a single heavy duty aluminum, piano style hinge for years of reliable service. Attractive bright diamond tread aluminum finish that is resistant to rust and stands up under harsh weather conditions.