Mudguards; mud flaps for vehicles; splash guards for vehicles; slot- and screw-mounted mudguard brackets for attaching mudguards to vehicles as structural parts of vehicles; non-metal tool boxes specially adapted for attaching to vehicle chassis for storing tool kits; mud flaps or splash guards for vehicles made of synthetic material; structural parts and structural fittings for the aforesaid goods, namely, tubular and rectangular mudguard supports for attaching mudguards to vehicles