thanks for your suggestions..any other suggestion would be welcomed

hey im looking for plugin tool to create a 3 dimensional object involving a single drag of a rectangle button..
for example i would like to drag a rectangle to create any sized object with the third dimension predefined as 0.75"..so that i can create plywood pieces in a single command rather than using rectangle tool along with push pull tool to create the depth of 0.75"...
anyone have any suggestions?