... .width:0.5m-3m 4.shape:Round, Square Galvanized Triangle Hole Punches Punch Metal /Punched Metal/perforated metalMaterialCarbon steel ... coated,galvanized,polished,or no finishHole shapeRound, Square, Slot, Triangle, Long round, Scale, Diamond, Oval, Hexangular, etcHole dia ... is widely used in lots of cities across the highway, railway, subway and other transportation services and facilities ...