... ,copper,aluminum,galvanized zinc. hole diameter:0.55-100mm board thickness:0.2mm-15mm Detailed Description Metal material: iron, ... stainless steel,copper,aluminum,galvanized zinc.Nonmetal board:plywood,fiberboard,dense board,plastic board and rubber board..Hole forms we can process are:round ... in the following specifications:hole diameter:0.55-100mm,board thickness:0.2mm-15mm.We can also make the ...