External right Angles measurement , internal right Angles measurement , straight line measurement , 45° Angles measurement , horizontal and vertical measurement , depth measurement , right Angles center measurement , multifunctional Male inch double-sided combination square , aluminum alloy base stainless steel ruler body , has long service life Thickening the ruler body is more stable , overall thickening Etching scale , accuracy , clear scale , easy to read Lightweight and portable , to use, Manufacturer: Watreketal