Theres nothing more frustrating than coming to adjust that wobbly screw bolt or fixing and finding its a hex shaped fitting and all you have is screwdrivers the gdc zip hex aims to make sure you never again waste time on your bike ride or fumbling through your kitchen drawers for that elusive allen key easy to use with strong keys that can handle lots of torque the retaining strap can be attached to any zip loop or keyring features five common hex sizes 25mm 3mm 4mm 5mm 6mm alw