Third Edge: mm Millimeter Gradua tion Styles Precision Rules 30 First Edge: None Second Edge: 1/2mm Fourth Edge: 1/2mm Third Edge: mm 35 Reads both left-to-right and right-to-left. A Starrett original feature. First Edge: mm Second Edge: 1/2mm Fourth Edge: mm Third Edge: 1/2mm 35E First Edge: mm End Graduations: mm Second Edge: 1/2mm Fourth Edge: mm Third Edge: 1/2mm NOTE: All rules under 25mm in width have single row of millimeter figures. Rules 25mm and wider have double row of millimeter figures, and each edge represents the bottom edge reading left to right. 37 First Edge: mm Second Edge: 1/2mm Fourth Edge: 1/2mm Third Edge: mm 37E First Edge: mm End Graduations: mm Second Edge: 1/2mm Fourth Edge: 1/2mm 293 starrett.com P recision R ules , S traight E dges , P arallels