These adjustable straps are tough! Made of seat belt webbing, hook and loop tape and shock cord they offer an amazing alternative to other luggage strapping options. On a bike, such as a cafe racer with no racks, you can put the shock loops around places like indicators, shocky bolts etc. They also come with knobs that can be screwed or riveted to your bike. This is for a pair of the smaller ones which are 400mm (opens to approx. 500mm) for $17.