Craig Petty's Tool Colour Changing Deck is a powerful take on the classic colour-changing deck plot, utilising David Stone's Tool gimmick. In this highly visual routine, the deck dramatically changes colour as part of a demonstration on sleight-of-hand, leaving the audience stunned. After the transformation, the spectator’s signed card is revealed to have a blank back with the words "Your Card" printed in large letters. The deck remains examinable, making it a perfect opener for any card magic set. Craig breaks down the handling and use of Tool on the Netrix, showing how this eye-popping effect can be added to your repertoire.