Abstract: A lockable tie down strap used to secure various loads to a variety of support surfaces, such as a vehicle, a boat, a pallet, a shelf, a tray, a cage, or the like. The lockable tie down strap has one loose end that is secured in a key-operated locking member to prevent theft, and is preferably constructed of a tubular webbing with steel cables running through the body of the webbing to prevent cutting of the strap, and thereby more securely hold a load by the strap. The strap may also be provided with loose ends having openings or a hook at the ends, for use with a roof rack or a wire cage to hold equipment or a flexible load in position.