The tigra sport mountcase bike kit pro for iphone 6 with armourguard is a tough and burly case and mounting option for your bike instead of a strap mount the mountcase 2 bike kit pro is supplied with the stem cap mount this places your smartphone in the centre of your handle bars which makes for quick and direct viewing of your phone a spring lock automatically locks your phone onto the bracket to prevent any movement even if your cycling the roubaix