"Law 5: The bat". The bat is no more than in length, no more than wide, no more than deep at its middle and no deeper than at the edge. The hand or glove holding the bat is considered part of the bat. Ever since the ComBat incident, a highly publicised marketing attempt by Dennis Lillee, who brought out an aluminium bat during an international game, the Laws have provided that the blade of the bat must be made of wood.