This T shaped aluminum alloy right angles marking ruler is suitable for positioning and marking wood and glass at right angles and isometrics marking 1 / 32 ' ' hole pitches, high-precisions marking Adopting a semicircular handle design, the is more and This T shaped aluminum alloy right angles ruler is aluminum alloy and anodized and the texture is lightweight This T-shaped aluminum alloy right angles ruler can realize multiple functions such as horizontal line, vertical line, long line, short line, parallelline and right angles line, Manufacturer: HZBB