Operating in a similar fashion to Heward's Handy Haversack and Ehlonna's Quiver, this item (shaped like a large bracelet, and taking up room where a buckler would) is permanently linked to a singularly-shaped extradimensional space. The wearer, as a free action, may draw a specially-prepared tower shield into the space, or deploy the shield in front of him, again as a free action. The item does not use charges. The extradimensional space cannot accommodate anything not shaped more or less like a tower shield; spikes, or other features that distort the shield's shape, are also forbidden.