... Hole Punch Punch Metal /Punched Metal/perforated metalMaterialCarbon steel, Aluminum, Brass, Copper.FinishPowder coated,galvanized,polished,or no finishHole shapeRound, Square, Slot, Triangle, Long ... Plate, etc.· Hole shape: Long hole, square hole, round hole, hexagonal hole, scale hole, stretching and other special-shaped hole.· Hole style: circular hole, hexagonal hole, fish scale hole, etc. ...