Sea to Summit Bomber Loop Lock screed Bomber Loop Lock is a universal fastening in the form of a belt with loops at each end. By feeding the shank through the loop, the screed can be fixed at two separate points for a universal and reliable fastening. Features of the Bomber Loop Lock tightening belt Double loops on both ends. Includes an elastic loop for compact storage when folded. Polyester, protected from ultraviolet radiation. Durable nickel-plated buckle with rubber protective overlay.