The cards in this deck are designed to be easy guides to the most important points about doubles and redoubles. They come with a ring in the package so you can make them your own. Sort the cards your own way, write on the cards and use the cards with your partners. Table of contents: Balancing Double Control-showing Redouble D0P1, R0P1 & DEPO Disciplined Doubling Do Something Intelligent (DSI) Double Doubling One No Trump Doubling Three No Trump Equal-level-conversion Double Lead-directing Double Lightner Double Maximal Double Minimum Off-shape Takeout Double Negative Double Penalty Double Responsive Double Rosenkrantz Double or Redouble Snapdragon Double SOS Redouble Stolen-bid Double Strength-showing Redouble Support Double & Redouble The Undoubled Contract Takeout Doubles: Beyond the Basics Through What Level? Responding in Competition Responding not in Competition Rebids by Doubler Rebids by Opener Cards measure 4" x 6". Comes with a 1" ring so you can arrange the cards the way you want to arrange them.