SRD:Bashing

Bashing: A shield with this special ability is designed to perform a shield bash. A bashing shield deals damage as if it were a weapon of two size categories larger (a Medium light shield thus deals 1d6 points of damage and a Medium heavy shield deals 1d8 points of damage). The shield acts as a +1 weapon when used to bash. (Only light and heavy shields can have this ability.)

Moderate transmutation; CL 8th; Craft Magic Arms and Armor, bull’s strength; Price +1 bonus.