Material: stainless steel ,Aluminum,low carbon steel,alloy steel Shape:square hole,rectangel,diamond and so on Material: stainless steel ,Aluminum,low carbon steel,alloy steel,copper sheet and so on Shape:Hole Patterns including: Round; Rectangular hole; Square; Triangle; Diamond; Hexagonal; Cross; Slotted; and other patterns according to your drawings or application requirement. Hole patternHole ...