This little lock goes with us everywhere as it is small and light enough not to notice in your bag and will stop opportunist thieves, while you duck into a shop/pub/café/toilets, etc while out riding. It makes that queuing/pint/coffee and cake/poo that much more relaxed. Just remember it isn't a lock you'd use in town. OK, apart from keeping the saddle connected to the bike frame on your commuter, like we do, so some little scroat doesn't nick your saddle and quick release seatpost.