A punch apparatus for cutting an opening in a sheet of material is disclosed. The punch apparatus includes a base plate, a measuring stick provided on the base plate and a punch assembly having multiple blades adjustably mounted on the measuring stick for cutting the material. The punch apparatus facilitates the expeditious measurement, marking and cutting of openings for electrical outlet boxes, switch boxes or other utility boxes in sheetrock or other material as well as precise replication of the openings in the sheetrock or other material.